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  • 351.
    Srinivasan, Divya
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Sandlund, Jonas
    Umeå University, Department of Community Medicine and Rehabilitation, Physiotherapy.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Motor variability traits among individuals performing repetitive precision work2014Ingår i: Proceedings of the 11th International Symposium on Human Factors in Organizational Design and Management (ODAM), and 46th Annual Nordic Ergonomics Society Conference (NES): Selected and peer reviewed papers / [ed] Ole Broberg et al., Santa Monica, CA: The IEA Press , 2014, s. 987-989Konferensbidrag (Refereegranskat)
    Abstract [en]

    Motor variability (MV) refers to the intrinsic variability naturally present in the motor control system. Occurring even in the simplest movements, it is usually manifested as a difference in joint movements, joint coordination and/or muscle activities between successive repeats of a task which are identical in performance. Contrary to the traditional view that MV is detrimental to performance, it is now widely accepted that MV may actually have an important functional role in skill acquisition, and that skilled performance may, actually, be associated with increased MV. Further, MV is related to pain and fatigue, and may play a decisive role in rehabilitation (reviewed in Srinivasan & Mathiassen 2012). Hypothetically, individuals with a larger MV would be better protected against overuse injuries, and recover faster after disorders affecting motor performance. However, whether the extent of MV is, indeed, a consistent individual trait across different tasks is not known.    

    The purpose of this study was to let individuals perform a laboratory-based simulation of repetitive upper-extremity precision work and determine:

    (i)             Whether it is possible to systematically classify individuals according to the size of their MV in repetitive work;

    (ii)            Whether classification of individuals in one working condition on one day persists even when some work-factors are slightly changed, and between different days when they perform the same work.

    Repetitive pipetting with a cycle time of 2.8s was performed in the laboratory by a group of 14 healthy female subjects, aged 20-45 years, right-handed and experienced in pipetting, on 3 different days under identical protocol and experimental conditions. Work factors such as work-pace, precision and cognitive load (on top of the pipetting work) were manipulated within each day. Kinematic data were obtained using electromagnetic motion capture systems (FASTRAK).

    MV in shoulder elevation, elbow flexion and shoulder-elbow coordination were operationalized using cycle-to-cycle standard deviations of motor parameters such as peak velocities, time lag of peak velocities, phase angle and inter-segmental phase angle. The resulting traits in individuals and the consistency of those traits across tasks and days will be presented.

  • 352.
    Srinivasan, Divya
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Sinden, Kathryn
    Department of Kinesiology and Physical Education, McGill University, Montréal.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Coté, Julie
    Department of Kinesiology and Physical Education, McGill University, Montréal.
    Gender differences in muscle activity responses to a fatiguing short-cycle repetitive task2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    Background. More women suffer from musculoskeletal disorders (MSDs) in the neck-shoulder and hand-arm regions than men, even when they are performing similar jobs. Fatigue is a known predictor of MSDs, and gender differences in fatigue responses could help explain the difference in MSD occurrence. This study aimed to assess the extent to which genders differ in fatigability by examining muscle-activity responses when perform-ing a low-force, repetitive arm-task leading to muscle fatigue in the neck-shoulder region.

    Methods. 108 healthy individuals (55 males, 53 females) repeatedly touched two targets placed at shoulder height in front of them. The targets were placed at 30% and 100% of arm’s length and touched at a rate established by a 1Hz metronome until the subjects reported a perceived exertion of 8 on the Borg CR-10 scale for the neck-shoulder region. Bipolar surface EMG was recorded from the upper trapezius, anterior deltoid, biceps and triceps. Task duration and EMG amplitude (average and cycle-to-cycle variability) during the first minute (baseline) and last minute (fatigue-terminal) were compared between men and women.

    Results. There were no gender differences in task duration, EMG variability at baseline, or change in average EMG amplitude with fatigue. Change in EMG variability from baseline to fatigue-terminal was lower for women than men in the upper trapezius (7.2% vs. 30.6% increase, p=0.02), and higher for women than men in the biceps (11.8% increase vs. 23.2% decrease, p=0.0006).

    Discussion.This is the first study to report gender differences in muscle-activity responses to a fatiguing, dynamic manual task relevant to working life based on a comprehensive sample of healthy individuals. Despite no differences in task duration, there may be gen-der differences in the physiological mechanisms behind fatigue adaptations: while women may use compensatory mechanisms mainly involving the elbow, men may use more shoulder-driven strategies. These gender differences in muscle-activity responses may contribute to explaining why women suffer more from neck-shoulder MSDs than men.

  • 353.
    Srinivasan, Divya
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Grado Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, United States.
    Sinden, Kathryn
    McGill University, Montreal, Canada; CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, Canada.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Côté, Julie
    McGill University, Montreal, Canada; CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, Canada.
    Gender differences in muscle activity responses and fatigability to a short-cycle repetitive task2016Ingår i: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 116, nr 11-12, s. 2357-2365Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose: Epidemiological research has identified women to be more susceptible to developing neck-shoulder musculoskeletal disorders when performing low-force, repetitive work tasks. Whether this is attributable to gender differences in fatigability and motor control is currently unclear. This study investigated the extent to which women differ from men in fatigability and motor control while performing a short-cycle repetitive task.

    Methods: 113 healthy young adults (58 women, 55 men) performed a standardized repetitive pointing task. The task was terminated when the subject's perceived exertion reached 8 on the Borg scale. Time to task termination, and changes in means and cycle-to-cycle variabilities of surface electromyography signals from start to end of the task were compared between women and men, for the upper trapezius, anterior deltoid, biceps and triceps muscles.

    Results: Women and men terminated the task after 6.5 (SD 3.75) and 7 (SD 4) min on average (p>0.05). All 4 muscles showed an increase of 25-35% in average muscle activity with fatigue (no significant sex differences). However, men exhibited a higher increase than women in trapezius muscle variability with fatigue (31% vs. 7%; p<0.05), and a decrease in biceps muscle variability where women had an increase (-23% vs. 12%; p<0.05).

    Conclusions: Our results suggest that women and men may not differ in the ability to perform repetitive tasks at low-to-moderate force levels. However, differences in motor control strategies employed in task performance may explain gender differences in susceptibility to developing musculoskeletal disorders when performing repetitive work for prolonged periods in occupational life.

  • 354.
    Staaf, Emmelie
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap.
    Socialt stöd av chefen inför arbetsåtergång: Förväntningar hos personer med utmattningssyndrom2018Självständigt arbete på avancerad nivå (magisterexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Under de sista decennierna har den psykiska ohälsan i Sverige ökat dramatiskt och orsakat en omfattande sjukfrånvaro med en hög belastning på samhällets socialförsäkringssystem som följd. Utmattningssyndrom är en av de vanligaste diagnoserna som leder till sjukfrånvaro, som följd av både psykiska och fysiska symtom. Chefen har stort ansvar och en viktig roll i rehabiliteringsprocessen, där det sociala stödet från hens sida tycks vara betydelsefullt. Emellertid är det mindre känt vad personer som är sjukskrivna för utmattningssyndrom förväntar sig att få för socialt stöd av chefen inför arbetsåtergång, vilket undersöks och beskrivs närmare i den här studien. En kvalitativ tvärsnittsdesign tillämpades och fem individer som alla var sjukskrivna till följd av utmattningssyndrom inkluderades. De genomgick en semistrukturerad intervjuprocess, där innehållet transkriberades och analyserades genom kvalitativ innehållsanalys. Resultatet visar att personer som är sjukskrivna för utmattningssyndrom förväntar sig att få socialt stöd av chefen inför arbetsåtergång. Det är framförallt ansvar och trygghet som utgör det sociala stödet, vilket yttrar sig genom olika variationer av känslomässig inlevelse, praktiska åtaganden och kommunikation. Ett strukturerat, lyhört och engagerat ledarskap där relativt långtgående, individfokuserade arbetsmiljöanpassningar erbjuds i samverkan med andra aktörer beskrivs av informanterna som viktigt inför arbetsåtergång. Studien förstärker inte bara den tidigare bilden av det sociala stödets betydelse i sammanhanget, utan diskuterar även mer ingående vilka förväntningar av socialt stöd som upplevs väsentliga. 

  • 355.
    Staats, Henk
    et al.
    Department of Social and Organizational Psychology, Leiden University, Leiden, The Netherlands.
    Jahncke, Helena
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Herzog, Tom
    Department of Psychology, Grand Valley State University, Allendale, MichiganUSA.
    Hartig, Terry
    Institute for Housing and Urban Research, Uppsala University, Uppsala, Sweden.
    Urban options for psychological restoration: common strategies in everyday situations2016Ingår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 11, nr 1, artikel-id e0146213Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    OBJECTIVES:Given the need for knowledge on the restorative potential of urban settings, we sought to estimate the effects of personal and contextual factors on preferences and restoration likelihood assessments for different urban activities-in-environments. We also sought to study the generality of these effects across different countries.

    METHODS:We conducted a true experiment with convenience samples of university students in the Netherlands (n = 80), Sweden (n = 100), and the USA (n = 316). In each country, the experiment had a mixed design with activities-in-environments (sitting in a park, sitting in a cafe, walking in a shopping mall, walking along a busy street) manipulated within-subjects and the need for restoration (attentional fatigue, no attentional fatigue) and immediate social context (in company, alone) manipulated between-subjects. The manipulations relied on previously tested scenarios describing everyday situations that participants were instructed to remember and imagine themselves being in. For each imagined situation (activity-in-environment with antecedent fatigue condition and immediate social context), subjects provided two criterion measures: general preference and the likelihood of achieving psychological restoration.

    RESULTS:The settings received different preference and restoration likelihood ratings as expected, affirming that a busy street, often used in comparisons with natural settings, is not representative of the restorative potential of urban settings. Being with a close friend and attentional fatigue both moderated ratings for specific settings. Findings of additional moderation by country of residence caution against broad generalizations regarding preferences for and the expected restorative effects of different urban settings.

    CONCLUSIONS:Preferences and restoration likelihood ratings for urban activity-environment combinations are subject to multiple personal and contextual determinants, including level of attentional fatigue, being alone versus in company, and broader aspects of the urban context that vary across cities and countries. Claims regarding a lack of restorative quality in urban environments are problematic.

  • 356.
    Stensdotter, Ann-Katrin
    et al.
    Umeå University, Umeå, Sweden; Sør-Trøndelag University College, Trondheim, Norway.
    Bjerke, Joakim
    Umeå University, Umeå, Sweden; Sør-Trøndelag University College, Trondheim, Norway.
    Djupsjöbacka, Mats
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Postural sway in single-limb and bilateral quiet standing after unilateral total knee arthroplasty2015Ingår i: Gait & Posture, ISSN 0966-6362, E-ISSN 1879-2219, Vol. 41, nr 3, s. 769-773Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Aim: To investigate whether total knee arthroplasty (TKA) was associated with stability in single-limb stance and whether reduced stability in single-limb stance was associated with increased postural sway in bilateral quiet standing. Methods: 3D kinematics for center of mass was used to assess postural sway in 23 subjects with TKA and 23 controls. Tests included bilateral quiet standing with and without vision and on a compliant surface, and single-limb stance. Results: 30% of the subjects in the TKA group were unable to maintain single-limb stance for 20. s on any leg. Of the 70% in the TKA group able to stand on one leg, mean sway velocity in the medio-lateral direction was marginally higher for the prosthetic side (p = .02), but no differences were found between the TKA and the control group in single-limb stance. Performance in bilateral quiet standing was similar in TKA-subjects, able as well as unable to stand on one leg, and controls. Reduced quadriceps strength in the contralateral leg, higher BMI, and older age predicted failure to maintain single-limb stance. Conclusion: In subjects able to stand on one leg, performance was considered comparable between the prosthetic and contralateral side and between groups. Inability to stand on one leg did not affect postural sway in bilateral quiet standing. The results suggest that inability to maintain single-limb stance is explained by reduced physical capacity rather than the knee condition in itself. The present study emphasizes the importance of physical activity to improve strength and functional capacity.

  • 357. Stensdotter, Ann-Katrin
    et al.
    Lorås, Håvard W.
    Fløvig, John Christian
    Djupsjöbacka, Mats
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Postural control in quiet standing in patients with psychotic disorders2013Ingår i: Gait & Posture, ISSN 0966-6362, E-ISSN 1879-2219, Vol. 38, nr 4, s. 918-922Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    There is evidence that patients with psychotic conditions display greater center of pressure (CoP) displacement during quite standing than healthy subjects, but the underlying impairments in the control mechanisms are uncertain. The aim of this study was to identify the nature of possible impairments in the control of posture by modulation of visual and kinesthetic information during quiet standing. Center of pressure (CoP) data and whole-body kinematics of the center of mass (CoM) were recorded during quite standing on a firm surface with eyes open and with eyes closed, and standing with eyes open on a yielding surface. During all three conditions, patients displayed greater migration of CoM and CoP-CoM, a measure related to ankle joint torque, whereas CoP-frequency (MPF) was similar in patients and healthy subjects. Our results suggested that greater postural sway in patients may depend on disproportionally large ankle joint torque without corresponding increase in frequency. Furthermore, interactions between groups and conditions suggested that the patients made less use of visual information for postural control than the healthy subjects.

  • 358.
    Straker, Leon
    et al.
    School of Physiotherapy, Curtin University, Perth, Australia.
    Abbott, Rebecca
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Heiden, Marina
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Toomingas, Allan
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Sit-stand desks in call centres: associations of use and ergonomics awareness with sedentary behavior2013Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 44, nr 4, s. 517-522Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objective. Sedentary behavior is an independent risk factor for obesity, diabetes, and all cause mortality. With adults in occupational settings spending two thirds or more of their time in sedentary behavior, novel strategies are required to intervene with occupational sitting. To investigate whether or not use of sit-stand desks and awareness of the importance of postural variation and breaks are associated with the pattern of sedentary behavior in office workers.

    Method. The data came from a cross-sectional observation study of Swedish call centre workers. Inclinometers recorded ‘seated’ or ‘standing/walking’ episodes of 131 operators over a full work shift. Differences in sedentary behavior based on desk type and awareness of the importance of posture variation and breaks were assessed by non-parametric analyses.

    Results. 90 (68.7%) operators worked at a sit-stand desk. Working at a sit-stand desk, as opposed to a sit desk, was associated with less time seated (78.5 vs 83.8%, p=0.010), and less time taken to accumulate 5 minutes of standing/walking (36.2 vs 46.3 minutes, p=0.022), but no significant difference to sitting episode length or the number of switches between sitting and standing/walking per hour. Ergonomics awareness was not associated with any sedentary pattern variable among those using a sit-stand desk.

    Conclusion. Use of sit-stand desks was associated with better sedentary behavior in call centre workers, however ergonomics awareness did not enhance the effect. Further investigation into how best to intervene with occupational sitting is required.

  • 359.
    Straker, Leon
    et al.
    Curtin University, Perth.
    Campbell, Amity
    Curtin University, Perth.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Abbott, Rebecca
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Parry, Sharon
    Curtin University, Perth.
    Davey, Paul
    Curtin University of Technology, Perth.
    Capturing the pattern of physical activity and sedentary behavior: Exposure Variation Analysis of accelerometer data2014Ingår i: Journal of Physical Activity and Health, ISSN 1543-3080, E-ISSN 1543-5474, Vol. 11, nr 3, s. 614-625Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND: Capturing the complex time pattern of physical activity (PA) and sedentary behavior (SB) using accelerometry remains a challenge. Research from occupational health suggests exposure variation analysis (EVA) could provide a meaningful tool. This paper (1) explains the application of EVA to accelerometer data, (2) demonstrates how EVA thresholds and derivatives could be chosen and used to examine adherence to PA and SB guidelines, and (3) explores the validity of EVA outputs.

    METHODS: EVA outputs are compared with accelerometer data from 4 individuals (Study 1a and1b) and 3 occupational groups (Study 2): seated workstation office workers (n = 8), standing workstation office workers (n = 8), and teachers (n = 8).

    RESULTS: Line graphs and related EVA graphs highlight the use of EVA derivatives for examining compliance with guidelines. EVA derivatives of occupational groups confirm no difference in bouts of activity but clear differences as expected in extended bouts of SB and brief bursts of activity, thus providing evidence of construct validity.

    CONCLUSIONS: EVA offers a unique and comprehensive generic method that is able, for the first time, to capture the time pattern (both frequency and intensity) of PA and SB, which can be tailored for both occupational and public health research.

  • 360.
    Straker, Leon
    et al.
    School of Physiotherapy and Exercise Science, Curtin University, Perth.
    Hall, Caitlin
    The University of Queensland, School of Human Movement and Nutrition Sciences, Brisbane.
    Holtermann, Andreas
    National Research Centre for the Working Environment, Copenhagen.
    van der Beek, Allard
    Department of Public and Occupational Health, Amsterdam Public Health Research Institute, VU University Medical Centre, Amsterdam.
    Huijsmans, Maaike
    Department of Public and Occupational Health, Amsterdam Public Health Research Institute, VU University Medical Centre, Amsterdam.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Gilson, Nicholas
    The University of Queensland, School of Human Movement and Nutrition Sciences, Brisbane.
    Blue‐collar worker sedentary exposure at work and non‐work: systematic review of studies using objective measurement2018Konferensbidrag (Refereegranskat)
  • 361.
    Straker, Leon
    et al.
    School of Physiotherapy and Exercise Science, Curtin University, Perth.
    Hallman, David
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Gupta, Nidhi
    National Research Centre for the Working Environment, Copenhagen.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Holtermann, Andreas
    National Research Centre for the Working Environment, Copenhagen.
    The Goldilocks Principle: Innovative work design for improved health2018Konferensbidrag (Refereegranskat)
  • 362.
    Straker, Leon
    et al.
    School of Physiotherapy, Curtin University, Perth, Australia.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Holtermann, Andreas
    National Research Centre for the Working Environment, Copenhagen, Denmark.
    The ‘Goldilocks Principle’: designing physical activity at work to be ‘just right’ for promoting health2018Ingår i: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 52, nr 13, s. 818-819Artikel i tidskrift (Refereegranskat)
  • 363.
    Svedberg, Pia
    et al.
    Division of Insurance Medicine, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
    Mather, Lisa
    Division of Insurance Medicine, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
    Bergström, Gunnar
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Division of Intervention and Implementation Research for Worker Health, The Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
    Lindfors, Petra
    Department of Psychology, Stockholm University, Stockholm, Sweden.
    Blom, Victoria
    Division of Insurance Medicine, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Psychology, Stockholm University, Stockholm, Sweden; The Swedish School of Sport and Health Sciences, Stockholm, Sweden.
    Time pressure and sleep problems due to thoughts about work as risk factors for future sickness absence2018Ingår i: International Archives of Occupational and Environmental Health, ISSN 0340-0131, E-ISSN 1432-1246, Vol. 91, nr 8, s. 1051-1059Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    PURPOSE: This study investigated whether time pressure or sleep problems due to thoughts about work are associated with future sickness absence (SA) among women and men employed in different sectors, also when adjusting for confounders including familial factors (genetics and shared environment).

    METHODS: The study sample included 16,127 twin individuals (52% women), aged 19-47 years who in 2005 participated in an online survey including questions regarding time pressure, sleep, work and health. Register data on SA (> 14 days) were obtained from the National Social Insurance Agency and individuals were followed from date of survey response until 12/31/2013. Associations between time pressure, sleep problems due to thoughts about work and future SA were investigated using logistic regression analyses to assess odds ratios (OR) with 95% confidence intervals (CI).

    RESULTS: In total 5723 (35%) individuals had an incident SA spell during follow-up. Sleep problems due to thoughts about work were associated with SA in the fully adjusted model (OR 1.22, CI 1.10-1.36). Stratified by sector, the highest estimate was found for state employees (OR 1.54, CI 1.11-2.13). Familial factors did not seem to influence the associations. We found no statistically significant associations between time pressure and SA. No sex differences were found.

    CONCLUSIONS: Results indicated that sleep problems due to thoughts about work is a risk factor for future SA. This follows previous research showing that sleep length and sleep disturbances, regardless of reason, are associated with SA. But, experiences of work-related time pressure seem to have no effect on SA.

  • 364.
    Svedmark, Åsa
    et al.
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.
    Björklund, Martin
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.
    Häger, Charlotte K.
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.
    Nilsson Sommar, Johan
    Department of Public Health & Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå, Sweden.
    Wahlström, Jens
    Department of Public Health & Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå, Sweden.
    Impact of Workplace Exposure and Stress on Neck Pain and Disabilities in Women: A Longitudinal Follow-up After a Rehabilitation Intervention2018Ingår i: Annals of Work Exposures and Health, ISSN 2398-7316, Vol. 62, nr 5, s. 591-603Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Introduction: The aim was to evaluate if pain, disability, and work productivity are influenced by physical and psychosocial work exposures as well as by stress, up to 1 year after a randomized controlled trial treatment intervention, and to determine whether any such association differed between treatment and control groups.

    Methods: Ninety-seven working women suffering non-specific neck pain (n = 67 treatment group, n = 30 control group) were followed from end of treatment intervention and at 9- and 15-month follow-ups, respectively. Physical and psychosocial exposures, as well as perceived stress, were assessed after the treatment intervention. Pain, neck disability, and work productivity were assessed at baseline, after intervention 3 months later and at 9- and 15-month follow-ups. Longitudinal assessment was conducted using the exposure level at 3 months as predictor of pain, disability, and work productivity at 3, 9, and 15 months, respectively. Mixed models were used to estimate longitudinal associations, accounting for within-individual correlation of repeated outcome measures by incorporation of a random intercept. Age and duration of neck pain were adjusted for in all models. To evaluate group differences, interactions between exposures and treatment groups were estimated.

    Results: High perceived stress was associated with more neck pain, more neck disability, and decreased work productivity in both cross-sectional and longitudinal analyses. High 'control of decision' was associated with less neck pain, less neck disability, and higher work productivity in cross-sectional analyses but only to less disability and higher productivity in longitudinal analyses. Shoulder/arm load was the only physical exposure variable that was significantly associated with work productivity in the univariate analyses. Only small differences were observed between treatment and control groups.

    Conclusion: High perceived stress and low 'control of decision' were associated with more neck pain, increased neck disability, and decreased work productivity. Treatment interventions for individuals with neck pain should take into account psychosocial workplace exposures and stress to improve intermediate and long-term results.

  • 365.
    Svedmark, Åsa
    et al.
    Institutionen för samhällsmedicin och rehabilitering, fysioterapi, Umeå universitet.
    Björklund, Martin
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Department of Community Medicine and Rehabilitation, Physiotherapy, Umea University, Umeå Sweden.
    Häger, Charlotte
    Institutionen för samhällsmedicin och rehabilitering, fysioterapi. Umeå universitet.
    Sommar, Johan
    Institutionen för folkhälsa och klinisk medicin, yrkes- och miljömedicin. Umeå universitet.
    Wahlström, Jens
    Institutionen för folkhälsa och klinisk medicin, yrkes- och miljömedicin. Umeå universitet.
    Impact of physical and psychosocial workplace exposure and stress on neck pain rehabilitation in women: - a longitudinal study2017Ingår i: International Archives of Occupational and Environmental Health, ISSN 0340-0131, E-ISSN 1432-1246Artikel i tidskrift (Refereegranskat)
  • 366.
    Svedmark, Åsa
    et al.
    Institutionen för samhällsmedicin och rehabilitering, enheten för fysioterapi, Umeå universitet, Umeå.
    Djupsjöbacka, Mats
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Häger, Charlotte
    Institutionen för samhällsmedicin och rehabilitering, enheten för fysioterapi, Umeå universitet.
    Jull, Gwendolen
    Centre of Clinical Research Excellence in Spinal Pain, Injury and Health, The University of Queensland, Brisbane, Australia.
    Björklund, Martin
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Institutionen för samhällsmedicin och rehabilitering, enheten för fysioterapi, Umeå universitet, Umeå.
    Is tailored treatment superior to non-tailored treatment for pain and disability in women with non-specific neck pain?: a randomized controlled trial2016Ingår i: BMC Musculoskeletal Disorders, ISSN 1471-2474, E-ISSN 1471-2474, Vol. 17, nr 1, artikel-id 408Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND:

    The evidence for the effect of treatments of neck pain is modest. In the absence of causal treatments, a possibility is to tailor the treatment to the individuals' functional limitations and symptoms. The aim was to evaluate treatment effects of a tailored treatment versus a non-tailored treatment. Our hypothesis was that tailored treatment (TT) would have better effect on pain intensity and disability than either non-tailored treatment (NTT) (same treatment components but applied quasi-randomly) or treatment-as-usual (TAU) (no treatment from the study, no restrictions). We further hypothesized that TT and NTT would both have better effect than TAU.

    METHOD:

    One hundred twenty working women with subacute and chronic non-specific neck pain were allocated to 11 weeks of either TT, NTT or TAU in a randomized controlled trial with follow-ups at 3, 9 and 15 months. The TT was designed from a decision model based on assessment of function and symptoms with defined cut-off levels for the following categories: reduced cervical mobility, impaired neck-shoulder strength and motor control, impaired eye-head-neck control, trapezius myalgia and cervicogenic headache. Primary outcomes were pain and disability. Secondary outcomes were symptoms, general improvement, work productivity, and pressure pain threshold of m. trapezius.

    RESULTS:

    Linear mixed models analysis showed no differences between TT and NTT besides work productivity favoring TT at 9- and 15-months follow-ups. TT and NTT improved significantly more than TAU on pain, disability and symptoms at 3-month follow-up. General improvement also favored TT and NTT over TAU at all follow-ups.

    CONCLUSION:

    Tailored treatment according to our proposed decision model was not more effective than non-tailored treatment in women with subacute and chronic neck pain. Both tailored and non-tailored treatments had better short-term effects than treatment-as-usual, supporting active and specific exercise therapy, although therapist-patient interaction was not controlled for. Better understanding of the importance of functional impairments for pain and disability, in combination with a more precise tailoring of specific treatment components, is needed to progress.

  • 367.
    Svedmark, Åsa
    et al.
    Institutionen för samhällsmedicin och rehabilitering, fysioterapi, Umeå universitet, Umeå, Svergie.
    Häger, Charlotte
    Institutionen för samhällsmedicin och rehabilitering, fysioterapi, Umeå universitet, Umeå, Sverige.
    Djupsjöbacka, Mats
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Björklund, Martin
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Institutionen för samhällsmedicin och rehabilitering, fysioterapi, Umeå universitet, Umeå, Sverige.
    Self-estimated general improvement in function and health after tailored and non-tailored neck-shoulder pain treatment in women : A randomized controlled trial2015Ingår i: World Confederation for Physical Therapy Congress 2015, Singapore, 1-4 May, 2015., 2015Konferensbidrag (Refereegranskat)
  • 368.
    Svensson, Sven
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Mittuniversitetet, Sweden.
    Organizational Trust: How to include the division of labour?2018Ingår i: Economic and Industrial Democracy, ISSN 0143-831X, E-ISSN 1461-7099, Vol. 39, nr 2, s. 72-293Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of this article is to study the relevance of the division of labour to the formation of organizational trust. Trust is defined as a phenomenon related to the resources available to a person in a given social position, a social position which in turn is related to the division of labour. It is argued that work externalization constitutes a division of labour, and that differing access to resources for internal and external workers explains variations in trust. The theoretical propositions are tested in a quantitative analysis of 711 external workers and internal employees in a Swedish organization. The results lend partial support to the theory. External employees are found to be less likely have strong trust in their co-workers. The relationship is mediated by perceptions of shared norms in the organization.

  • 369.
    Svensson, Sven
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Stubbs, Jonathan
    Nordic Occupational Safety and Rehabilitation Institute.
    Larsson, Johan
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    The association between subordinate perception of task and relation oriented leadership behaviors and sense of coherence among a sample of Swedish white-collar workers2018Ingår i: Work: A journal of Prevention, Assessment and rehabilitation, ISSN 1051-9815, E-ISSN 1875-9270, Vol. 61, nr 2, s. 327-336Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Evidence suggests that leadership behaviours and sense of coherence influences subordinate health. The influence of leadership behaviours on subordinate sense of coherence has not been investigated in any detail. This cross-sectional quantitative study of managers and subordinates in a large governmental organisation focus on this potential association. The study used two common and empirically tested leadership styles: task oriented leadership and relations oriented leadership. In a logistic regression analysis, the association between types of leadership behaviour and SOC were analysed while controlling for age, gender, income, type of employment and organisational tenure. It was hypothesized that both task and relation oriented leadership behaviours would be positively associated with SOC, whereas a laissez faire leadership would be negatively associated with SOC. The hypotheses were not supported. Several implications for further research are discussed including capturing data about both subordinates’ preferred and perceived leadership behaviours.

  • 370.
    Svensson, Sven
    et al.
    Department of Social Sciences, Mid Sweden University, Ostersund, Sweden.
    Vinberg, Stig
    Department of Health Sciences, Mid Sweden University, Östersund.
    Larsson, Johan
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    External workers' perception of leadership behavior - a study of Swedish temporary agency workers and contractors2015Ingår i: Human Resource Management Journal, ISSN 0954-5395, E-ISSN 1748-8583, Vol. 25, nr 2, s. 250-266Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The increasing prevalence of externalized work arrangements in industrialized countries has brought with it ever greater managerial complexityin the workplace. This article explores how leadership behavior is perceived byinternal and external workers within a public authority in Sweden. Questionnaire data from 505 temporary agency workers (TAWs), contractors, andinternal employees have been analyzed. Multinomial logistic regression analysesindicate that external workers such as TAWs and contractors are more likelythan internal employees to notice leadership profiles, including pronounced,task-oriented leadership behavior. These results hold true when controlled fordemographic and socio-economic variables and organizational tenure. A practicalimplication is that explicit attention should be paid to the need forleadership training in developing HRM strategies with regards to externalemployees.

  • 371.
    Söderlund, Helena
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap.
    Universitetslärares upplevelse av arbetsrelaterad stress och återhämtning vid distansarbete2017Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Universitetslärares arbetsförhållanden har förändrats och den arbetsrelaterade stressen ses öka bland akademiker inom universitetet. Arbetsgruppen distansarbetar i olika omfattning vilket kan påverka deras upplevelse av arbetsrelaterad stress och återhämtning.Tidigare forskning gällande distansarbete och upplevelse av arbetsrelaterad stress och återhämtning visar framförallt att distansarbete medför minskad stress. Syftet med studien var att undersöka om universitetslärares upplevelse av arbetsrelaterad stress och återhämtning skiljde sig beroende på i vilken omfattning de distansarbetar. Studien var enempirisk tvärsnittsstudie, med en kvantitativ ansats. Nittiofem stycken universitetslärare från två högskolor besvarade en webenkät varav 46 % distansarbetade flera gånger i veckan. Resultatet visar att universitetslärares upplevelse av återhämtning skilde sig beroende på distansarbetets omfattning, men inte arbetsrelaterad stress. Kön visade sig ha liten påverkan på återhämtningen relaterad till arbetet i relation till distansarbete, men inte på arbetsrelaterad stress. Slutsatsen är att universitetslärare som distansarbetar sällan upplever bättre återhämtning jämfört med de som distansarbetar i större omfattning. Skillnaden i återhämtning kan bero på att distansarbete gör det svårare för universitetsläraren att slutföra och begränsa sitt arbete jämfört med de som inte distansarbetar.

  • 372. Takala, Esa-Pekka
    et al.
    Pehkonen, Irmeli
    Forsman, Mikael
    Hansson, G. Å.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Neuman, P.
    Sjøgaard, Gisela
    Veiersted, K. B.
    Westgaard, R.
    Winkel, Jörgen
    Systematic evaluation of observational methods assessing biomechanical exposures at work2009Ingår i: Proceedings of the IEA2009 conference, Beijing, 2009Konferensbidrag (Refereegranskat)
  • 373.
    Tengmo, Matilda
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap.
    Flexibelt arbete och stress: En kvantitativ enkätstudie på universitetsanställda2017Självständigt arbete på avancerad nivå (magisterexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Bakgrund: Ett flexibelt arbete innebär att arbetet är flexibelt gällande tid och rum där arbetstagarna får ett stort inflytande över när, var och hur länge de ska utföra sitt arbete. Flexibiliteten kan innebära att gränserna mellan arbete och privatliv suddas ut, där det föreligger individuella skillnader i såväl förmågan att sätta gränser mellan domänerna arbete och privatliv som preferenser gällande gränssättande, där vissa föredrar att hålla arbetet på arbetet medan andra trivs med att blanda samman arbetet med privatliv.

    Syfte: Syftet med studien var att undersöka om obalans mellan beteende och preferenser inom ett flexibelt arbete visade samband med stress hos undervisande och forskande personal på ett universitet. Studien kontrollerade även för relevanta variabler.

    Metod: Designen var en tvärsnittsstudie där en enkät skickades ut till 1271 undervisande och forskande personal på ett universitet. För att mäta gränslöst beteende, preferenser gällande gränssättande och stress användas tre stycken etablerade formulär; Work interrupting nonwork behaviors scale, Workplace segmentation preferences och COPSOQ II. Svarsfrekvensen var 39,7% och två hierarkiska multipla regressionsanalyser genomfördes med stress som utfallsvariabel, arbetsbelastning och undervisningsfördelning som förväxlingsvariabler och prediktorn utgjordes i analys 1 av Obalans – Beteende, seg. (n=218) och i analys 2 av Obalans – Beteende, integ. (n=303).

    Resultat: I analys 1 förelåg det ett negativt samband mellan stress och Obalans – Beteende, seg. När förväxlingsvariablerna kontrollerades förklarade Obalans – Beteende, seg. 4,4% av variationen i stress. I analys 2 förelåg det ett positivt samband mellan stress och Obalans – Beteende, integ. När förväxlingsvariablerna kontrollerades förklarade Obalans – Beteende, integ. 9,3% av variationen i stress.

    Slutsats: Föreliggande studie indikerar på att obalans mellan beteende och preferenser både är en faktor som kan genera i ökad och minskad stress, där studiens resultat tyder på att obalansen värderas olika vilket i sin tur skulle kunna bero på att segregation respektive integration är olika svårt att uppnå.

  • 374.
    Toebes, Marcel
    et al.
    Faculty of Human Movement Sciences, VU University, Amsterdam, the Netherlands.
    Hoozemans, Marco
    Faculty of Human Movement Sciences, VU University, Amsterdam, the Netherlands.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Dekker, Joost
    Department of Rehabilitation Medicine, VU University Medical Center, Amsterdam, the Netherlands.
    van Dieën, Jaap
    Faculty of Human Movement Sciences, VU University, Amsterdam, the Netherlands.
    Measurement strategy and statistical power in studies assessing gait stability and variability in older adults2016Ingår i: Aging Clinical and Experimental Research, ISSN 1594-0667, E-ISSN 1720-8319, Vol. 28, nr 2, s. 257-265Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background: Gait variability and stability measures might be useful to assess gait quality changes after fall prevention programs. However, reliability of these measures appears limited.

    Aims: The objective of the present study was to assess the effects of measurement strategy in terms of numbers of subjects, measurement days and measurements per day on the power to detect relevant changes in gait variability and stability between conditions among healthy elderly.

    Methods: Sixteen healthy older participants (65.6 (SD 5.9) years), performed two walking trials on each of two days. Required numbers of subjects to obtain sufficient statistical power for comparisons between conditions within subjects (paired, repeated-measures designs) were calculated (with confidence intervals) for several gait measures and for different numbers of trials per day and for different numbers of measurement days.

    Results: The numbers of subjects required to obtain sufficient statistical power in studies collecting data from one trial on one day in each of the two compared conditions ranged from 7-13 for large differences but highly correlated data between conditions, up to 78-192 for data with a small effect and low correlation.

    Discussion: Low correlations between gait parameters in different conditions can be assumed and relatively small effects appear clinically meaningful. This implies that large numbers of subjects are generally needed.

    Conclusion: This study provides the analysis tools and underlying data for power analyses in studies using gait parameters as an outcome of interventions aiming to reduce fall risk.

  • 375.
    Toomingas, Allan
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Karolinska Institutet.
    Hagberg, Mats
    Göteborgs Universitet.
    Heiden, Marina
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Richter, Hans
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Westergren, Karl-Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Wigaeus Tornqvist, Ewa
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Jönköping University, School of Health Sciences.
    Risk factors, incidence and persistence of symptoms from the eyes among professional computer users2014Ingår i: Work: A journal of Prevention, Assesment and rehabilitation, ISSN 1051-9815, E-ISSN 1875-9270, Vol. 47, nr 3, s. 291-301Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND:

    Symptoms from the eyes are common among computer users. Knowledge is scarce about these problems, however.

    OBJECTIVES:

    The aim was to study risk-factors, incidence and persistence of eye-symptoms among professionally active computer users.

    METHODS:

    This was a questionnaire based prospective study where 1283 males and females from different professions and companies answered a baseline questionnaire about individual factors and working conditions, e.g. duration of daily computer work, comfort of screen work, psychosocial factors. Subjects were at baseline and 10 follow-ups asked about the number of days with eye-symptoms during the preceding month.

    RESULTS:

    The incidence-rate of symptoms persisting minimum three days was 0.38/person-year. A multivariate Hazard-ratio model showed significant associations with extended continuous computer work, tasks with high demands on eye-hand coordination, low level of control, visual discomfort, female sex and nicotine use. Eye-symptoms at baseline was a strong risk factor for new symptoms.

    CONCLUSION:

    The incidence of eye-symptoms among professional computer users is high and related to both individual and work-related factors. The organization of computer work should secure frequent breaks from near-work at the computer screen. The severity of vision-related problems could in field studies be quantified by asking for the persistence of symptoms.

  • 376.
    Trask, Catherine
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. University of Saskatchewan, College of Medicine, Centre for Health & Safety in Agriculture, Saskatoon, SK S7N 0W8, Canada.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Jackson, Jennie
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Wahlström, Jens
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Umea University, Department of Public Health & Clinical Medical Occupational & Environmental Medicine, SE-90185 UmeåSweden.
    Data processing costs for three posture assessment methods2013Ingår i: BMC Medical Research Methodology, ISSN 1471-2288, E-ISSN 1471-2288, Vol. 13, nr 1, s. 124-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objectives. Data processing contributes a non-trivial proportion to total research costs, but documentation of these costs is rare. This paper employed a priori cost tracking for three posture assessment methods (self-report, observation of video, and inclinometry), developed a model describing the fixed and variable cost components, and simulated additional study scenarios to demonstrate the utility of the model. 

    Methods. Trunk and shoulder postures of aircraft baggage handlers were assessed for 80 working days using all three methods. A model was developed to estimate data processing phase costs, including fixed and variable components related to study planning and administration, custom software development, training of analysts, and processing time.   

    Results. Observation of video was the most costly data processing method with total cost of 31,433, and was 1.2-fold more costly than inclinometry (€ 26,255), and 2.5-fold more costly than self-reported data (€ 12,491). Simulated scenarios showed altering design strategy could substantially impact processing costs. This was shown for both fixed parameters, such as software development and training costs, and variable parameters, such as the number of work-shift files processed, as well as the sampling frequency for video observation.  When data collection and data processing costs were combined, the cost difference between video and inclinometer methods was reduced to 7%; simulated data showed this difference could be diminished and, even, reversed at larger study sample sizes. Self-report remained substantially less costly under all design strategies, but produced alternate exposure metrics. 

    Conclusions. These findings build on the previously published data collection phase cost model by reporting costs for post-collection data processing of the same data set.  Together, these models permit empirically based study planning and identification of cost-efficient study designs.

  • 377.
    Trask, Catherine
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Rostami, Mehdi
    School of Public Health, University of Saskatchewan, Canada.
    Partly visible periods in posture observation from video: prevalence and effect on summary estimates of postures in the job2015Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 49, s. 63-69Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We investigated the extent to which observers rate clearly visible postures on video differently from postures that are only partly visible, and whether this would have an effect on full-shift posture summaries. Trunk and upper arm postures were observed from 10,413 video frames representing 80 shifts of baggage handling; observers reported whether postures were fully or only partly visible.  Postures were summarized for each shift into several standard metrics using all available data, only fully visible frames, or only partly visible frames. 78% of trunk and 71% of upper arm postural observations were inferred.  When based on all data, mean and 90th percentile trunk postures were 1.3° and 5.4° lower, respectively, than when based only on fully visible situations.  For the arm; differences in mean and 90thpercentile were 2.5° and 8.1°.  Daily posture summaries can, thus, be significantly influenced by whether partly visible postures are included or not

  • 378.
    Trask, Catherine
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Centre for Health and Safety in Agriculture, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Rostami, Mehdi
    Collaborative Biostatistics Program, School of Public Health, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
    Heiden, Marina
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Observer variability in posture assessment from video recordings: the effect of partly visible periods2017Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 60, s. 275-281Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Observers rank partly visible postures on video frames differently than fully visible postures, but it’s not clear if this is due to differences in observer perception. This study investigated the effect of posture visibility on between-observer variability in assessments of trunk and arm posture.  Trained observers assessed trunk and arm postures from video recordings of 84 pulp mill shifts using a work sampling approach; postures were also categorized as ‘fully’ or ‘partly’ visible.  Between-worker, between-day, and between-observer variance components and corresponding confidence intervals were calculated. Although no consistent gradient was seen for the right upper arm, trunk posture showed smaller between-observer variance when all observers rated a posture as fully visible. This suggests that, partly- visible data, especially when observers disagree as to the level of visibility, introduces more between-observer variability when compared to fully visible data.  Some previously-identified differences in daily posture summaries may be related to this phenomenon.

  • 379.
    Trask, Catherine
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Rostami, Mehdi
    Collaborative Biostatistics Program, School of Public Health, University of Saskatchewan.
    Heiden, Marina
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Variance components of observed postural exposure - the effect of partly visible periods2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    Background. Previous studies have shown that video-based observation of postures that are only partly visible leads to different daily summary values than when postures are fully visible. However, the source of these differences is unclear. The purpose of this study was to estimate the between-observer variance of trunk and arm posture estimates (relative to within- and between-worker variance), and to investigate the effect of visibility on this observer variability of trunk and arm postural exposure estimates.

    Methods. Video recordings were made of 28 pulp mill workers for three full shifts each. Trunk and arm postures were then estimated by trained observers using a work sampling approach; posture images were also assessed as being “fully” or “partly” visible. REML techniques were used to estimate the between-worker, between-day and betweenobserver components of variance at different visibility levels; Wald-based confidence intervals and p-values were used to determine sources of variation.

    Results. Estimates of partly visible postures (as agreed upon by all observers) were lower than fully visible postures. However, more than 90% of trunk observations and 85% of arm observations did not have full agreement on visibility between observers. Right upper arm posture showed smaller between-observer variance when all observers rated a posture to be fully visible, as compared to all observers agreeing it was only partly visible. This suggests partly visible data introduces more methodological (i.e. between-observer) variability when compared to fully visible data. However, no significant differences in between-observer variability were found for the trunk, suggesting that other factors explain the reported differences in estimated postures between fully and partly visible data in this case.

    Discussion. Future studies involving concurrent direct measurement would determine whether there is a true difference in posture between partly visible and fully visible periods, or whether the difference between fully and partly visible periods are related to observer performance.

  • 380.
    Trask, Catherine
    et al.
    Centre for Health and Safety in Agriculture, College of Medicine, University of Saskatchewan.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Wahlström, Jens
    Department of Public Health & Clinical Medicine, Umeå University.
    Getting what we pay for: comparing the cost efficiency of direct and observed trunk posture methods2013Ingår i: Eighth International Conference on Prevention of Work-related Musculoskeletal Disorders; abstracts, 2013, s. 177-Konferensbidrag (Refereegranskat)
  • 381.
    Trask, Catherine
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Wahlström, Jens
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Forsman, Mikael
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Cost-efficient assessment of biomechanical exposure in occupational groups, exemplified by posture observation and inclinometry2014Ingår i: Scandinavian Journal of Work, Environment and Health, ISSN 0355-3140, E-ISSN 1795-990X, Vol. 40, nr 3, s. 252-265Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objectives: This study compared the cost-efficiency of observation and inclinometer assessment of trunk and upper arm inclination in a population of flight baggage handlers, as an illustration of a general procedure for addressing the trade-off between resource consumption and statistical performance in occupational epidemiology.

    Methods:  Trunk and upper arm inclination with respect to the line of gravity were assessed for 3 days on each of 27 airport baggage handlers using simultaneous recordings by inclinometers and video.  Labour and equipment costs associated with data collection and data processing were tracked throughout.  Statistical performance, in terms of the inverse of the standard deviation and root mean squared error of the group mean exposure, was computed from the variance components within and between workers, and bias (with inclinometer assumed to produce ‘correct’ inclination angles).  The behavior of the trade-off between cost and efficiency with changed sample size, as well as with changed logistics for data collection and processing, was investigated using simulations.

    Results:  At similar total costs, time spent at trunk and arm inclination angles greater than 60 degrees as well as 90th percentile arm inclination were estimated at higher precision using inclinometers, while median inclination and 90th percentile trunk inclination was determined more precisely using observation.  This hierarchy persisted in a scenario where the study was immediately reproduced in another population, while inclinometry was more cost-efficient than observation for all three posture variables in a scenario where data were already collected and only needed to be processed. Observations showed to be biased relative to the –assumed to be correct – inclinometer data, and so inclinometry became the most cost-efficient option for all posture variables and irrespective of scenario when statistical performance was measured by bias and precision combined.

    Conclusions: Inclinometers were more cost-efficient in use than observation for two out of three posture metrics investigated when statistical performance was measured only in terms of precision. Since observations were biased, inclinometers consistently outperformed observation when both bias and precision were included in statistical performance. The presented general model for assessing cost-efficiency may be used for designing exposure assessment strategies with considerations not only to statistical criteria, but even to costs. The empirical data provide a specific basis for planning assessments of working postures in occupational groups.

  • 382.
    Tronarp, Rebecca
    et al.
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.
    Nyberg, André
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.
    Hedlund, Mattias
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.
    Häger, Charlotte K.
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.
    McDonough, Suzanne
    Institute of Nursing and Health Research, Ulster University, Jordanstown, UK.
    Björklund, Martin
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.
    Office-cycling: a promising way to raise pain thresholds and increase metabolism with minimal compromising of work performance2018Ingår i: BioMed Research International, ISSN 2314-6133, E-ISSN 2314-6141, Vol. 2018, artikel-id 5427201Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Sedentary behaviour constitutes a risk for lifestyle related diseases and musculoskeletal pain which does not seem to be compensated for by shorter bouts of high intensity physical activity. A way of tackling this may be long term light intensity physical activity while performing office work.

    Aim: Establish the effects of low intensity cycling (LC), moderate intensity cycling (MC) and standing at a simulated office workstation on pain modulation, metabolic expenditure and work performance.

    Methods: 36 healthy adults (21 females), mean age 26.8 (SD 7.6) years, partook in this randomized 3x3 cross-over trial with 75 minutes of LC on 20% of maximum aerobic power output (MAP), 30 minutes of MC on 50% of MAP and standing 30 minutes with 48 hours wash-out periods. Outcome measures were pain modulation (pressure- and thermal pain thresholds, (PPT and TPT)), work performance (transcription, mouse pointing and cognitive performance) and metabolic expenditure.

    Results: PPTs increased in all conditions. Median increase in PPT trapezius was highest after LC; 39.3 kilopascal (kPa) (15.6;78.6) compared to MC; 17.0 kPa (2.8;49.9) and standing; 16.8 kPa (-5.6;39.4), p=0.015. TPT showed no change. Work performance; compared to standing, transcription was reduced during LC and MC, mouse pointing was faster in LC but had more errors while slower with more errors in MC. Performance in the cognitive task did not differ between conditions. Metabolic expenditure rates differed between all conditions (p<0.001) and were 1.4 (1.3;1.7), 3.3 (2.3;3.7) and 7.5 (5.8;8.7) kilocalories per minute during standing, LC and MC, respectively.

    Conclusions: LC seem to be the preferred option since it raised PPTs, more than doubled metabolic expenditure, while minimally influencing work performance when compared to standing. Thus, LC is promising but requires corroboration in field studies.

  • 383.
    van der Beek, Allard
    et al.
    Department of Public and Occupational Health, Amsterdam Public Health research institute, VU University Medical Centre, Amsterdam.
    Dennerlein, Jack T.
    Bouvé College of Health Sciences, Northeastern University, Boston.
    Huysmans, Maaike
    Department of Public and Occupational Health, Amsterdam Public Health research institute, VU University Medical Centre, Amsterdam.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Burdorf, Alex
    Department of Public Health, Erasmus MC, University Medical Center Rotterdam.
    van Mechelen, Willem
    Department of Public and Occupational Health, Amsterdam Public Health research institute, VU University Medical Centre, Amsterdam.
    van Dieën, Jaap
    Department of Human Movement Sciences, Vrije Universiteit Amsterdam.
    Frings-Dresen, Monique
    Academic Medical Center, Department Coronel Institute of Occupational Health and Netherlands Center for Occupational Diseases, Amsterdam.
    Holtermann, Andreas
    National Research Centre for the Working Environment, Copenhagen.
    Janwantanakul, Prawit
    Work-related Musculoskeletal Injury Research Unit, Department of Physical Therapy, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok.
    van der Molen, Henk
    Academic Medical Center, Department Coronel Institute of Occupational Health and Netherlands Center for Occupational Diseases, Amsterdam.
    Rempel, David
    Division of Occupational and Environmental Medicine, University of California, San Francisco.
    Straker, Leon
    Curtin University, School of Physiotherapy and Exercise Science, Perth.
    Walker-Bone, Karen
    Arthritis Research UK/MRC centre for Musculoskeletal Health and Work, University of Southampton.
    Coenen, Pieter
    Department of Public and Occupational Health, Amsterdam Public Health research institute, VU University Medical Centre, Amsterdam.
    A research framework for the development and implementation of interventions preventing work-related musculoskeletal disorders2017Ingår i: Scandinavian Journal of Work, Environment and Health, ISSN 0355-3140, E-ISSN 1795-990X, Vol. 43, nr 6, s. 526-539Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objectives: Work-related musculoskeletal disorders (MSD) are highly prevalent and put a large burden on the (working) society. Primary prevention of work-related MSD focuses often on physical risk factors (such as on manual lifting and awkward postures), but has not been too successful in reducing the MSD burden. This may partly be caused by insufficient knowledge of etiological mechanisms and/or a lack of adequately feasible interventions (theory failure and program failure, respectively), possibly due to limited integration of research disciplines. A research framework could link research disciplines thereby strengthening the development and implementation of preventive interventions. Our objective was to define and describe such a framework for multi-disciplinary research on work-related MSD prevention.

    Methods: We described a framework for MSD prevention research, partly based on frameworks from other research fields (i.e., sports injury prevention and public health).

    Results: The framework is composed of a repeated sequence of six steps comprising the assessment of 1) incidence and severity of MSD, 2) risk factors for MSD, and 3) underlying mechanisms; and the 4) development, 5) evaluation, and 6) implementation of preventive intervention(s).

    Conclusions: In the present framework for optimal work-related MSD prevention, research disciplines are linked. This framework can thereby help to improve theories and strengthen the development and implementation of prevention strategies for work-related MSD.

  • 384.
    van der Beek, Allard
    et al.
    Department of Public and Occupational Health, VU Medical Center, Amsterdam.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Burdorf, Alex
    Department of Public Health, Erasmus MC, Rotterdam.
    Efficient assessment of exposure to manual lifting using company data2013Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 44, nr 3, s. 360-365Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The objective of this study, based on an extensive dataset on manual materials handling during scaffolding, was to explore whether routinely collected company data can be used to estimate exposure to manual lifting.The number of manual lifts of scaffold parts while constructing/dismantling scaffolds was well predicted by the number of scaffolders in the team and the type of worksite, in combination with company data of either the number of scaffold parts or the scaffold volume. The proportion of explained variance in the number of lifts ranged from 77% to 92%, depending on the variables in the model. Data on scaffold parts and scaffold volume can easily be obtained from the company’s administration, since this is its usual paperwork supporting logistics and customer invoicing, respectively.We conclude that company data can be a promising source of information for ergonomic practitioners and researchers, to support assessment of manual lifting in scaffolding.

  • 385.
    Veiersted, Kaj Bo
    et al.
    National Institute of Occupational Health, Oslo.
    Forsman, Mikael
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Hansson, Gert-Åke
    Division of Occupational and Environmental Medicine, Lund University.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Assessment of time patterns of activity and rest in full-shift recordings of trapezius muscle activity - effects of the data processing procedure2013Ingår i: Journal of Electromyography & Kinesiology, ISSN 1050-6411, E-ISSN 1873-5711, Vol. 23, nr 3, s. 540-547Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The purpose of this paper was to compare the effects of different data reduction procedures on the values of variables characterizing the time pattern of trapezius muscle activity during full work shifts. Surface electromyography (EMG) of the right and left upper trapezius muscles were obtained from 40 young subjects in different occupations, mainly electricians, hairdressers and students. The target EMG variables were gap frequency, muscle rest, and the number and duration of episodes with sustained muscle activity (from 0.13 s to 30 min as minimum duration). These variables were derived from the EMG recordings using different Root Mean Square (RMS) windows (from 0.13 to 6.38 s), and discrimination levels between "activity" and "rest" (0.5, 1 and 2 % of maximal EMG). The results give basis for practical suggestions for EMG analyses of full work shifts. For most variables, a discrimination level of 0.5% EMGmax showed to be preferable. The time proportion of muscle rest and sustained muscle activity should, in general, be preferred over the corresponding frequency measures. Sustained muscle activity should be calculated using a RMS window between 1 and 3 s, and preferably be stated in terms of variables describing time proportions of activity. Uninterrupted activity episodes longer than 10 min proved not to be a useful variable due to limited occurrence in many work shifts.

  • 386.
    Wahlström, Jens
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå, Sweden.
    Bergsten, Eva
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Trask, Catherine
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Centre for Health and Safety in Agriculture, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Jackson, Jennie
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Forsman, Mikael
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. IMM Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
    Full-shift trunk and upper arm postures and movements among aircraft baggage handlers2016Ingår i: Annals of Occupational Hygiene, ISSN 0003-4878, E-ISSN 1475-3162, Vol. 60, nr 8, s. 977-990Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objectives: The present study assessed full shift trunk and upper arm postural exposure amplitudes, frequencies, and durations among Swedish airport baggage handlers, and aimed to determine whether exposures differ between workers at the ramp (loading and unloading aircraft) and baggage sorting areas.

    Methods: Trunk and upper arm postures were measured using inclinometers during three full work shifts on each of 27, male baggage handlers working at a large Swedish airport. Sixteen of the baggage handlers worked on the ramp and 11 in the sorting area. Variables summarizing postures and movements were calculated, and mean values and variance components between subjects and within subject (between days) were estimated using restricted maximum likelihood algorithms in a one-way random effect model.

    Results: In total, data from 79 full shifts (651 hours) were collected with a mean recording time of 495 minutes per shift (range 319-632). On average, baggage handlers worked with the right and left arm elevated >60° for 6.4% and 6.3% of the total workday, respectively. The 90th percentile trunk forward projection (FP) was 34.1° and the 50th percentile trunk movement velocity was 8°s-1. For most trunk (FP) and upper arm exposure variables, between-subject variability was considerable, suggesting that the flight baggage handlers were not a homogeneously exposed group. A notable between-days variability pointed to the contents of the job differing on different days. Peak exposures (>90°) were higher for ramp workers than for sorting area workers (trunk 0.6% ramp vs 0.3% sorting; right arm 1.3% ramp vs 0.7% sorting).

    Conclusions: Trunk and upper arm postures and movements among flight baggage handlers measured by inclinometry were similar to those found in other jobs comprising manual material handling, known to be associated with increased risks for musculoskeletal disorders. The results showed that full-shift trunk (FP), and to some extent peak arm exposures, were higher for ramp workers compared to sorting workers.

  • 387.
    Waleh Åström, Amanda
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Heiden, Marina
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Strömberg, Annika
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för socialt arbete och psykologi, Socialt arbete.
    Uncertainty in monetary cost estimates for assessing working postures using inclinometry, observation or self-report2017Ingår i: NES 2017 ”JOY AT WORK”: Conference Proceedings / [ed] Anna-Lisa Osvalder, Mikael Blomé and Hajnalka Bodnar, 2017, s. 160-161Konferensbidrag (Refereegranskat)
    Abstract [en]

    Background

    In order to optimize cost-efficiency when collecting posture data in field studies, accurate cost data are needed. A few studies have assessed costs of different measurement methods, but they did not address the uncertainty of the cost estimates. Information on the uncertainty of cost estimates is key input when deciding which method to use.

    Aim

    This study aimed atassessingthe uncertainty in estimates of costs for collecting posture data by inclinometry, observations and self-report.

    Method

    The study wasbased on data collected at a Swedish paper mill (Heiden et al. 2017)1. Using a model developed by Trask et al. (2014)2, costs were calculatedfor measuring trunk and upperarm postures of twenty-eight workers during three full shifts using inclinometers, observations from recorded videos, and workers’ self-reports from a questionnaire. For each measurement method, the uncertainty of the actually observed total cost was assessed by determining the range of costs between an assumed best case (lowest cost) and worst case (highest cost) using scenario analysis.

    Results

    Observation was the most expensive method (€41499) and also showed a large uncertainty in the cost estimate (€19089–€87154). Self-reports had the lowest cost (€9156) with the smallest uncertainty (€3941–€27473). The overall cost for inclinometry was €16851 with best and worst cases €8567 and €60313, respectively. The actual costs of inclinometry and self-reports in the conducted study were reasonably close to the best case.

    Discussion

    In their study of flight baggage handling, Trask et al. (2014) concluded that inclinometry was more expensive than observation when measuring trunk and arm postures. In the present study, we found observation to be the more expensive. Given the uncertainty in cost estimates, both results are plausible. Notably, in Trask et al. (2014), video recordings were restricted to 4 hours, whereas in the present material, video recordings covered full 7 -to 12-hour shifts. The time allocated to collecting video material for observations will significantly affect the cost comparison of methods, and this may serve as an example that further investigations of separate cost components for each method are warranted.

    Conclusions

    Based on a meticulous cost assessment, we found that cost estimates for observation of working postures were the most uncertain, followed by inclinometry and self-reports. A better understanding of data collection costs and their uncertainty, and thus of how to properly identifyan optimal measurement method, requires a deeper analysis of the cost model, and of the contributions of separate cost components to the overall cost

    1 https://doi.org/10.1093/annweh/wxw0262

    2 https://doi.org/10.5271/sjweh.3416

  • 388.
    Waleh Åström, Amanda
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Heiden, Marina
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Strömberg, Annika
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för socialt arbete och psykologi, Socialt arbete.
    Uncertainty in monetary cost estimates for assessing working postures using inclinometry, observation or self-report2018Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 71, s. 73-77Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objective: To assess uncertainty in cost estimates for collecting posture data by inclinometry, observations and self-report.

    Method: In a study addressing physical workloads at a paper mill, costs were calculated for measuring postures of twenty-eight workers during three shifts. Uncertainty in costs was assessed for all three methods as the range between an assumed best case (lowest cost) and worst case (highest cost) using scenario analysis.

    Results: The cost for observation was larger, but also more uncertain (€16506 and €89552 in the best and worst case, respectively) than that of inclinometry (€7613 - €45896). Self-report costs were both lower and less uncertain (€3743 - €23368).

    Conclusions: The extent of uncertainty in cost estimates implies that observation could be less expensive than inclinometry, e.g., in a scenario where experienced observers could use existing software, while inclinometers would have to be purchased. We propose adding uncertainty assessments to cost estimates when selecting a method for measuring working postures, and offer guidance in how to proceed in a specific setting.

  • 389.
    Waleh Åström, Amanda
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Heiden, Marina
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Strömberg, Annika
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för socialt arbete och psykologi, Socialt arbete.
    Uncertainty of cost components in assessments of working posture by different methods2018Konferensbidrag (Refereegranskat)
  • 390.
    Weber, Zachary R.
    et al.
    Department of Kinesiology and Physical Education, McGill University, Montreal, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Center, Jewish Rehabilitation Hospital, Laval, Quebec, Canada .
    Srinivasan, Divya
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia.
    Côté, Julie
    Department of Kinesiology and Physical Education, McGill University, Montreal; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Center, Jewish Rehabilitation Hospital, Laval, Quebec, Canada.
    Sex-Specific Links in Motor and Sensory Adaptations to Repetitive Motion-Induced Fatigue2018Ingår i: Motor Control, ISSN 1087-1640, E-ISSN 1543-2696, Vol. 22, nr 2, s. 149-169Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The objectives of this study were to assess the sex-specific relationships between motor and sensory adaptations to repetitive arm motion-induced neck/shoulder fatigue, and measure how additional sensory stimulation affected these adaptations. Twenty-three participants performed two sessions of a repetitive pointing task until scoring 8 on the Borg CR10 scale for neck/shoulder exertion or for a maximum of 45min, with and without sensory stimulation (i.e. light touch) applied on the fatiguing shoulder. Just before reaching the task termination criteria, all participants showed changes in mean and variability of arm joint angles and experienced a five-fold increase in anterior deltoid (AD) sensory threshold in the stimulus-present condition. Women with the greatest increases in AD sensory thresholds demonstrated the greatest increases in shoulder variability (r= .66) whereas men with the greatest increases in upper trapezius sensory thresholds demonstrated greatest changes in shoulder angle (r= -.60) and coordination (r= .65) variability. Thus, sensory stimulation had no influence on time-to-termination but affected how men and women differently adapted, suggesting sex differences in the sensorimotor fatigue response mechanisms.

  • 391.
    Wersäll, Minke
    et al.
    Swedish Work Environment Authority, Stockholm, Sweden.
    Mathiassen, Svend Erik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Jonsson, Christina
    Swedish Work Environment Authority, Stockholm, Sweden.
    Lorén, Kerstin
    aSwedish Work Environment Authority, Stockholm, Sweden.
    Sjöstedt-Landén, Angelika
    Department of Social Sciences, Mid Sweden University, Östersund, Sweden.
    A Symposium on gender perspectives on musculoskeletal health at work – a Swedish initiative2015Ingår i: Proceedings of the 19th Triennial Congress of the International Ergonomics Association, Melbourne 9-14 August 2015, 2015Konferensbidrag (Refereegranskat)
  • 392.
    Wiesinger, Birgitta
    et al.
    Department of Odontology, Clinical Oral Physiology, Umeå University, Umeå, Sweden; Department of Research and Development, Umeå University, Sundsvall, Sweden.
    Häggman-Henrikson, Birgitta
    Department of Odontology, Clinical Oral Physiology, Umeå University, Umeå, Sweden; Department of Orofacial Pain and Jaw Function, Malmö University, Malmö, Sweden.
    Hellström, Fredrik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Englund, Erling
    Department of Research and Development, Umeå University, Sundsvall, Sweden.
    Wänman, Anders
    Department of Odontology, Clinical Oral Physiology, Umeå University, Umeå, Sweden.
    Does induced masseter muscle pain affect integrated jaw-neck movements similarly in men and women?2016Ingår i: European Journal of Oral Sciences, ISSN 0909-8836, E-ISSN 1600-0722, Vol. 124, nr 6, s. 546-553Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Normal jaw opening-closing involves simultaneous jaw and head-neck movements. We previously showed that, in men, integrated jaw-neck movements during jaw function are altered by induced masseter muscle pain. The aim of this study was to investigate possible sex-related differences in integrated jaw-neck movements following experimental masseter muscle pain. We evaluated head-neck and jaw movements in 22 healthy women and 16 healthy men in a jaw opening-closing task. The participants performed one control trial and one trial with masseter muscle pain induced by injection of hypertonic saline. Jaw and head movements were registered using a three-dimensional optoelectronic recording system. There were no significant sex-related differences in jaw and head movement amplitudes. Head movement amplitudes were significantly greater in the pain trials for both men and women. The proportional involvement of the neck motor system during jaw movements increased in pain trials for 13 of 16 men and for 18 of 22 women. Thus, acute pain may alter integrated jaw-neck movements, although, given the similarities between men and women, this interaction between acute pain and motor behaviour does not explain sex differences in musculoskeletal pain in the jaw and neck regions.

  • 393.
    Wiesinger, Birgitta
    et al.
    Dept. of Odontology, Clinical Oral Physiology, Umeå University.
    Häggman-Henrikson, Birgitta
    Dept. of Odontology, Clinical Oral Physiology, Umeå University.
    Hellström, Fredrik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Wänman, Anders
    Dept. of Odontology, Clinical Oral Physiology, Umeå University.
    Experimental masseter muscle pain alters jaw-neck motor strategy2013Ingår i: European Journal of Pain, ISSN 1090-3801, E-ISSN 1532-2149, Vol. 17, nr 7, s. 995-1004Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND:

    A functional integration between the jaw and neck regions has been demonstrated during normal jaw function. The effect of masseter muscle pain on this integrated motor behaviour in man is unknown. The aim of this study was to investigate the effect of induced masseter muscle pain on jaw-neck movements during a continuous jaw opening-closing task.

    METHODS:

    Sixteen healthy men performed continuous jaw opening-closing movements to a target position, defined as 75% of the maximum jaw opening. Each subject performed two trials without pain (controls) and two trials with masseter muscle pain, induced with hypertonic saline as a single injection. Simultaneous movements of the mandible and the head were registered with a wireless optoelectronic three-dimensional recording system. Differences in movement amplitudes between trials were analysed with Friedman's test and corrected Wilcoxon matched pairs test.

    RESULTS:

    The head movement amplitudes were significantly larger during masseter muscle pain trials compared with control. Jaw movement amplitudes did not differ significantly between any of the trials after corrected Wilcoxon tests. The ratio between head and jaw movement amplitudes was significantly larger during the first pain trial compared with control.

    CONCLUSIONS:

    Experimental masseter muscle pain in humans affected integrated jaw-neck movements by increasing the neck component during continuous jaw opening-closing tasks. The findings indicate that pain can alter the strategy for jaw-neck motor control, which further underlines the functional integration between the jaw and neck regions. This altered strategy may have consequences for development of musculoskeletal pain in the jaw and neck regions.

  • 394.
    Wiesinger, Birgitta
    et al.
    Umeå University and Västernorrland County Council.
    Häggman-Henriksson, Birgitta
    Umeå University and Malmö University.
    Wänman, Anders
    Umeå University.
    Lindqvist, Mikael
    Umeå University.
    Hellström, Fredrik
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Jaw-opening accuracy is not affected by masseter muscle vibration in healthy men2014Ingår i: Experimental Brain Research, ISSN 0014-4819, E-ISSN 1432-1106, Vol. 232, nr 11, s. 3501-3508Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    There is a functional integration between the jaw and neck regions with head extension–flexion movements during jaw-opening/closing tasks. We recently reported that trigeminal nociceptive input by injection of hypertonic saline into the masseter muscle altered this integrated jaw–neck function during jaw-opening/closing tasks. Thus, in jaw-opening to a predefined position, the head–neck component increased during pain. Previous studies have indicated that muscle spindle stimulation by vibration of the masseter muscle may influence jaw movement amplitudes, but the possible effect on the integrated jaw–neck function is unknown. The aim of this study was to investigate the effect of masseter muscle vibration on jaw–head movements during a continuous jaw-opening/closing task to a target position. Sixteen healthy men performed two trials without vibration (Control) and two trials with bilateral masseter muscle vibration (Vibration). Movements of the mandible and the head were registered with a wireless three-dimensional optoelectronic recording system. Differences in jaw-opening and head movement amplitudes between Control and Vibration, as well as achievement of the predefined jaw-opening target position, were analysed with Wilcoxon’s matched pairs test. No significant group effects from vibration were found for jaw or head movement amplitudes, or in the achievement of the target jaw-opening position. A covariation between the jaw and head movement amplitudes was observed. The results imply a high stability for the jaw motor system in a target jaw-opening task and that this task was achieved with the head–neck and jaw working as an integrated system.

  • 395.
    Wiitavaara, Birgitta
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Bengs, Carita
    Sociologiska institutionen, Umeå universitet.
    Brulin, Christine
    Institutionen för omvårdnad, Umeå universitet.
    Lekmannaperspektiv på hälsa bland personer med muskuloskeletala besvär2015Ingår i: Best Practice : Smärta, Vol. 4, nr 10, s. 20-23Artikel i tidskrift (Övrigt vetenskapligt)
  • 396.
    Wiitavaara, Birgitta
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Bengs, Carita
    Sociologiska institutionen, Umeå universitet.
    Brulin, Christine
    Institutionen för omvårdnad, Umeå universitet.
    Well, I'm healthy, but...: lay perspectives on health among people with musculoskeletal disorders2016Ingår i: Disability and Rehabilitation, ISSN 0963-8288, E-ISSN 1464-5165, Vol. 38, nr 1, s. 71-80Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    urpose: The purpose was to investigate lay perspectives on health among people with musculoskeletal disorders. Method: Semi-structured interviews were performed with 39 women and 30 men, (aged 22–63 years) with long-term, non-specific musculoskeletal disorders in the neck, shoulder and/or low back. Data was analysed using qualitative content analysis. Results: These people experienced health as “having resources and opportunities to lead the life one wants”. Three categories, “a good enough physical and psychological functioning, freedom of action, and a positive state of emotion and an enriching life”, illustrate the different resources and opportunities that the informants described as important for them to perceive themselves as healthy. The informants also reflected on “being ill” and “being well” and what makes the difference. Five aspects influenced the dynamics of their health experiences: “body and soul, prognosis, character of symptoms, physical and social activity, and emotional state”. Consequently, the informants expressed a holistic view of health, where the focus lies on the opportunity and the ability to lead their lives the way they want. Conclusions: This study points at the value of taking lay perspectives on health into account, as it might increase the opportunity to design effective, personalized rehabilitation strategies.

  • 397.
    Wiitavaara, Birgitta
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Fahlström, Martin
    Institutionen för klinisk vetenskap, Umeå universitet.
    Djupsjöbacka, Mats
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Prevalence, diagnostics, and management of musculoskeletal disorders in primary health care in Sweden: an investigation of 2000 randomly selected patient records2017Ingår i: Journal of Evaluation In Clinical Practice, ISSN 1356-1294, E-ISSN 1365-2753, Vol. 23, nr 2, s. 325-332Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background. To improve the care of patients suffering from musculoskeletal disorders (MSD) further knowledge regarding the prevalence, diagnostics and management of different MSD in primary care is required. Thus the aims of this study were: -to investigate the prevalence of patients seeking care due to different MSD at primary health care centres (PHCs); -to chart different factors as symptoms, diagnosis, and actions prescribed for patients that visited the PHCs due to MSD; and -to make comparisons regarding differences due to gender, age, and rural or urban PHC.

    Methods. 2000 patient records for patients in working age were randomly selected equally distributed on one rural and one urban PHC. A 3-year period was reviewed retrospectively. For all patient records age, sex, occupation, occupational activity, date of visit, if it was a new or re-visit, cause to the visit, and diagnosis related to the visit were registered. For visits due to MSD the location of the patients symptoms, which symptoms were described in the patient record, the type of those symptoms, which actions were prescribed to resolve the patients problems, and also sickleave prior to and after the visit, were registered. Data was analysed using cross tabulation, multidimensional Chi-square (Pearson), and a probability level of p < .05.

    Results. The prevalence of MSD was high, almost 60 % of the patients had some sort of MSD symptoms, either at the day for visit or the reviewed 3 year period, and a bit higher among women than men. Upper and lower limb problems were most common. Symptoms were most prevalent in the young and middle age-groups. The patients got a variety of different diagnoses, and between 13-35 % of the patients did not receive a MSD-diagnose despite having MSD-symptoms. There was a great variation in how the cases were handled. Medication and sick leave certificates were most common while work-related rehabilitation was less common. Conclusion. The present study points out some weaknesses regarding diagnostics and management of MSD in primary care. Further studies to compare the results regarding diagnoses for musculoskeletal symptoms and measures taken to solve the patients’ problems would be of interest.

  • 398.
    Wiitavaara, Birgitta
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Heiden, Marina
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Content and psychometric evaluations of questionnaires for assessing physical function in people with low back disorders: a systematic review of the literature2018Ingår i: Disability and Rehabilitation, ISSN 0963-8288, E-ISSN 1464-5165Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose: The purpose was to investigate how physical function is assessed in people with musculoskeletal disorders in the low back. Specifically:

    • Which questionnaires are used to assess physical function in people with musculoskeletal disorders in the low back?
    • What aspects of physical function do those questionnaires measure?
    • What are the measurement properties of the questionnaires?

    Materials and methods: A systematic review was performed to identify questionnaires and psychometric evaluations of them. The content of the questionnaires was categorised according to the International Classification of Function, Disability and Health, and the psychometric evaluations were categorised using the COnsensus-based Standards for the selection of health Measurement Instruments (COSMIN) checklist.

    Results: The questionnaires measured disability or ability to cope in everyday life, rather than physical function as such. Different aspects of a person’s mobility and ability to attend to one’s personal care were most often included regarding activity and participation. For body functions, items about sleep and pain were most often included. The Oswestry Disability Index and the Quebec Back Pain Disability Scale showed adequate psychometric properties in most evaluations.

    Conclusions: The extent of psychometric evaluations differed substantially, as did the items included. Focus of measurement was predominantly on activities in daily life.

    • Implications for rehabilitation
    • Valid and reliable instruments that measure relevant aspects of low back disorders are needed to provide early diagnostics and effective treatment.
    • Most questionnaires need more psychometric evaluations to establish the quality.
    • The Oswestry Disability Index and the Quebec Back Pain Disability Scale showed adequate psychometric properties in most evaluations.
    • The results may be useful when making decisions about which measurement instruments to use when evaluating low back disorders.
  • 399.
    Wiitavaara, Birgitta
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Heiden, Marina
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Content and psychometric evaluations of questionnaires for assessing physical function in people with neck disorders –  A systematic review of the literature2018Ingår i: Disability and Rehabilitation, ISSN 0963-8288, E-ISSN 1464-5165, Vol. 40, nr 19, s. 2227-2235Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Purpose: The purpose was to investigate how physical function is assessed in people with musculoskeletal disorders (MSD) in the neck. Specifically, we aimed to determine: (1) Which questionnaires are used to assess physical function in people with MSD in the neck? (2) What do those questionnaires measure? (3) What are the measurement properties of the questionnaires?

    Materials and methods: A systematic review was performed to identify questionnaires and psychometric evaluations. The content of the questionnaires was categorized according to the International Classification of Function, Disability and Health, and the psychometric properties were quality-rated using the COnsensus-based Standards for the selection of health Measurement INstruments checklist.

    Results: Ten questionnaires and 32 articles evaluating measurement properties were analyzed. Most questionnaires covered only the components body functions and activity and participation, more often activity participation than body function. Internal consistency was adequate in most questionnaires, whereas responsiveness was generally low. Neck Disability Index was most evaluated, but the evaluations of all questionnaires tended to cover most properties in the checklist.

    Conclusions: The questionnaires differed substantially in items and extent to which their psychometric properties had been evaluated. Focus of measurement was on activities in daily life rather than physical function as such.

    • Implications for Rehabilitation
    • To provide early diagnostics and effective treatment for patients with neck disorders, valid and reliable instruments that measure relevant aspects of the disorders are needed.

    • This paper presents an overview of content and quality of questionnaires used to assess physical function in neck disorders, which may facilitate informed decisions about which measurement instruments to use when evaluating the course of neck disorders.

    • Most of the questionnaires need more testing to judge the quality, however the NDI was the most frequently tested questionnaire.

    • The COnsensus-based Standards for the selection of health Measurement INstruments checklist is a useful tool in relation to psychometric testing of questionnaires, but clear definitions of interpretation of the quality criteria in each study would enhance comparability of results.

  • 400.
    Wiitavaara, Birgitta
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Heiden, Marina
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
    Content and quality of questionnaires for assessment of physical functioning in neck disorders – A systematic review of the literature2017Ingår i: Joy at Work, NES, 2017, 2017Konferensbidrag (Refereegranskat)
    Abstract [en]

    Valid and reliable instruments are required in order to determine effective interventions in the treatment of musculoskeletal disorders (MSD). Today, there is a lack of consistency in use of self-report outcome measures in research and practice, which makes it difficult or impossible to compare treatment effects. The questionnaires differ widely, in content as well as quality. The focus of present study was on assessment of physical functioning among people with MSD in the neck. The aim was to investigate how physical function is assessed in people with MSD in the neck. Specifically we wanted to determine: - Which questionnaires are used to assess physical function in people with musculoskeletal disorders in the neck? - What do those questionnaires measure? - What are the measurement properties of the questionnaires?

    The study was performed as a systematic literature review in order to identify articles presenting the questionnaires and psychometric tests of them. Items included in the questionnaires were classified according to the "International Classification of Functioning, Disability and Health", ICF. Thereafter, all psychometric tests of the different questionnaires were analysed with respect to relevant quality indicators using the "Cosmin checklist".

    Included in the final analysis were 10 questionnaires and 32 articles presenting psychometric tests of them. The analysis revealed that questionnaires for measuring physical functioning in neck disorders differ substantially in items and extent to which their psychometric properties have been evaluated. Most questionnaires contained only the ICF-components body functions and activity and participation, more often activity and participation. The most psychometrically tested questionnaire was Neck Disability Index. Remaining questionnaires were tested in fewer studies and only some of the properties in the Cosmin checklist were tested for most of them.

    Questionnaires for assessment of physical function in people with neck disorders tend to focus more on the ability to engage in activities of daily life than on physical function as such. Furthermore, the measurement properties of the questionnaires have usually been evaluated in few studies. It is vital to measure aspects that are of importance for the individual wellbeing and ability to function in work and daily life when evaluating neck disorders. However, to increase the validity of the results in clinical and research studies, it is also important to include the most relevant aspects of physical function. We recommend more psychometric testing of the questionnaires, especially those that cover important aspects of the ICF categories. To ensure coverage of important aspects, validation of the questionnaires against patients and practitioners is needed.

    A review and analysis of this kind makes it easier for researchers and clinicians to select the most suitable questionnaire for their own purpose, based on the content and quality of the questionnaire.

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