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  • 551.
    Nordlöf, Hasse
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Wiitavaara, Birgitta
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Winblad, Ulrika
    Institutionen för folkhälso- och vårdvetenskap, Uppsala universitet.
    Wijk, Katarina
    Samhällsmedicin, Landstinget Gävleborg. Institutionen för pedagogik, didaktik och utbildningsstudier, Uppsala universitet.
    Westerling, Ragnar
    Institutionen för folkhälso- och vårdvetenskap, Uppsala universitet.
    En beskrivning av anledningar till risktagande vid ett stort stålindustriföretag2013Conference paper (Other academic)
    Abstract [sv]

    Introduktion: Risktagande i en industriell arbetsmiljö är allvarligt eftersom det involverar risk för kroppsskada eller i värsta fall död. Syftet med föreliggande studie var att undersöka anledningar till risktagande, beskrivna av arbetare. Studien genomfördes i samarbete med ett stort svenskt stålindustriföretag med cirka 1000 anställda på den berörda orten.

    Metod: Studien hade en kvalitativ och beskrivande studiedesign. Datainsamlingen bestod av tio fokusgruppintervjuer med ca 6–8 arbetare per grupp och deltagarna var anställda i produktionen. Deltagarna rekryterades från samtliga av företagets fem huvudavdelningar för att få ett urval med maximal variation, och det slumpades fram vilka skiftlag som tillfrågades att delta. Intervjuerna hade en längd av 75 minuter och spelades in digitalt med en diktafon. Säkerhet på arbetet diskuterades på ett semi-strukturerat sätt, genom att låta arbetarna själva berätta och förklara anledningar till risktagande. Under intervjuerna lades betoningen på följdfrågor där deltagarna ombads att utveckla sina svar och använda egna exempel. Därutöver samlades bakgrundsdata in om deltagarna genom att de fyllde i ett kort frågeformulär. Intervjuerna transkriberades ordagrant och analyserades med kvalitativ innehållsanalys.

    Resultat: Anledningar till risktagande formades till följande sex aspekter: 1.Att vara ny på jobbet. 2.Att vara trött. 3.Att vara nonchalant inför riskerna. 4.Att arbeta på rutin och vara ”hemmablind”. 5.Att det finns för lite personal för att göra jobbet. 6.Att stressa, skynda sig och arbeta fortare för att spara tid. Ett incitament för anställda att riskera sin egen säkerhet kan till exempel vara att inte använda de avsedda verktygen för att snabbt få igång produktionen igen om ett stopp inträffar. Arbetarna upplevde att ledningen inte vill att produktionen ska gå långsamt, vilket dock användandet av rätt verktyg kan medföra. De upplevde också att ledningen inte vill att tillfälliga personalreduceringar skall påverka produktionstakten. Slutsats: Dels individens dagsform och dels yttre omständigheter i arbetsmiljön påverkar risktagandet.

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  • 552.
    Nordlöf, Hasse
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Wiitavaara, Birgitta
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Winblad, Ulrika
    Institutionen för folkhälso- och vårdvetenskap, Uppsala universitet.
    Wijk, Katarina
    Samhällsmedicin, Landstinget Gävleborg; Institutionen för pedagogik, didaktik och utbildningsstudier, Uppsala universitet.
    Westerling, Ragnar
    Institutionen för folkhälso- och vårdvetenskap, Uppsala universitet.
    Safety culture and reasons for risk-taking at a large steel-manufacturing company: Investigating the worker perspective2015In: Safety Science, ISSN 0925-7535, E-ISSN 1879-1042, Vol. 73, p. 126-135Article in journal (Refereed)
    Abstract [en]

    Workers in the steel-manufacturing industry face many safety risks due to the nature of the job. How well safety procedures and regulations are followed within an organization is considered to be influenced by the reigning culture of the organization. The aim of this study was to investigate and describe safety culture and risk-taking at a large steel-manufacturing company in Sweden by exploring workers’ experiences and perceptions of safety and risks. Ten focus group interviews were conducted with a total of 66 workers. In the interviews, the situation of safety at work was discussed in a semi-structured manner. The material was analyzed inductively using qualitative content analysis. The analysis resulted in a thorough description of safety culture and risk-taking at the company, based on the following five main categories: 1. Acceptance of risks, one simply has to accept the safety risks of the work environment, 2. Individual responsibility for safety, the responsibility for safe procedures rests to the largest extent on the individual, 3. Trade-off between productivity and safety, these are conflicting entities, wanting to produce as well as wanting to work safely, 4. Importance of communication, it is needed for safety actions to be effective, and 5. State-of-the-day and external conditions, an interplay between these factors affect risk-taking. In sociotechnical systems theory it is acknowledged that there are interactions between social and technical factors in organizations. The findings of this study are interpreted to be in line with a sociotechnical understanding of safety culture and risk-taking.

  • 553.
    Nordlöf, Hasse
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Wijk, Katarina
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Do small- and medium-sized enterprises differ in their work environment priorities?2011In: Wellbeing and innovations through ergonomics: Nordic Ergonomics Society (NES), Oulu, Finland, 18-21 september 2011, Nordic Ergonomics Society , 2011, p. 1-6Conference paper (Refereed)
    Abstract [en]

    Companies differ to what extent they attend to their work environments, despite that every employer is obliged to follow the national legislations on occupational, health and safety (OHS). Earlier evidence suggests that small and larger companies significantly differ in quality in how they handle their OHS activities. This study used questionnaire data from 106 small- and medium-sized companies. The findings were contrary to what could be expected, since no significant differences between company sizes were found. It is important to consider if it is factual or perceptual differences that’s being compared when examining companies’ work environment management.

  • 554.
    Nordlöf, Hasse
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Wijk, Katarina
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Uppfattningar om prioritering av arbetsmiljön i små och medelstora tillverkande företag2010In: Arbetsliv i förändring: Forum för arbetslivsforskning (FALF), Malmö, 19-21 maj 2010, 2010Conference paper (Other academic)
    Abstract [sv]

    Bakgrund: Inom forskningen råder det konsensus om att det finns signifikanta skillnader mellan hur små företag och större sköter om arbetet med arbetshälsa och säkerhet (Champoux & Brun, 2003; Lin & Mills, 2001; Hinze, 1988; Wilson, 200; Holmes, 1999). Ålder och kön anses vara karaktäristika som påverkar attityder kring miljö och miljöarbete (McKevier & Gadenne, 2005). Denna studie undersöker små och medelstora företags uppfattningar om hur arbetsmiljön prioriteras, enligt vad tillfrågade på företagen anser. Hur lika/olika är små och medelstora företag vid jämförelse, och spelar åldersgrupper eller kön hos respondenterna in i hur företagens prioritering av arbetsmiljön uppfattas?

    Metod: Företag med 10-49 anställda definieras som små företag, och 50-249 anställda som medelstora företag. Samtliga företag i dessa storleksgrupper, i ett län i Mellansverige, sysslandes med tillverkning, tillfrågades att besvara en enkät med 42 frågor om arbetsmiljön, där graden av prioritering av arbetsmiljön uppskattades på en skala (VAS, visual analogue scale). Två representanter per företag tillfrågades, företagsledare och skyddsombud, svarsfrekvensen var 60%, med 184 små företag och 63 medelstora. Svaren analyserades med det icke-parametriska testet Kruskal-Wallis i grupper om företagsstorlek, respondenternas ålder samt kön.

    Preliminära resultat: Resultaten visade att uppfattningarna kring prioritering av arbetsmiljön var övervägande lika då företagsstorlek jämfördes, i 5 av 42 frågor skiljde sig små och medelstora företag åt (p-värde <0.05, kruskall-wallis). Beträffande uppfattningarna bland åldersgrupperna (<35, 36-50, 51<) skiljde sig den äldsta åldersgruppen mot de andra två, i 12 av 42 frågor (p-värde <0.05, kruskall-wallis). I vidare analyser visade det sig också att uppfattningarna i åldergrupperna 36-50 och 51< i små företag skiljde sig åt mot motsvarande åldersgrupper i medelstora företag, i 8 av 42 frågor för åldersgruppen 36-50 i små företag, och 12 av 42 frågor för åldersgruppen 51< i små företag (p-värde <0.05, kruskall-wallis). Inga skillnader i uppfattningar mellan könen påträffades.

    Sammantaget visar det sig att inom små företag skiljer det sig mellan åldersgrupper i uppfattningar om prioritering av arbetsmiljön, där de yngsta (>35) inte uppfattar någon fråga högre prioriterad än någon av de två äldre åldersgrupperna, de medelålders (36-50) uppfattar hög prioritering på några områden som kan sammanfattas med orden – samspel och kommunikation, och de äldsta (50<) uppfattar hög prioritering på några områden som kan sammanfattas med orden – rutiner, kommunikation och förebyggande.

  • 555.
    Nordlöf, Hasse
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Wijk, Katarina
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Lindberg, Per
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    A comparison of managers’ and safety delegates’ perceptions of work environment priorities in the manufacturing industry2012In: Human Factors and Ergonomics in Manufacturing, ISSN 1090-8471, E-ISSN 1520-6564, Vol. 22, no 3, p. 235-247Article in journal (Refereed)
    Abstract [en]

    This study investigated the attention and priority accorded to factors of work environment within manufacturing companies, as perceived by managers and safety delegates at small- and medium-sized enterprises. Representatives from 142 Swedish manufacturing companies answered a 43-item questionnaire covering seven areas of the work environment and a priority-ranking question of company interests. Respondents (n = 249) rated the present situation and the situation one year earlier, using a visual analogue scale. The findings showed that both managers and safety delegates ranked profitability as the main company interest. Respondents rated the priorities of the work environment currently as higher than one year earlier (p = <0.05). Managers rated the priorities of the work environment higher than did the safety delegates (p = <0.05). We conclude that the two professional roles, managers and safety delegates, differ in their perceptions as of to which extent different work environment factors are being attended to.

  • 556.
    Nordlöf, Hasse
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Wijk, Katarina
    Samhällsmedicin, Landstinget Gävleborg; Institutionen för pedagogik, didaktik och utbildningsstudier, Uppsala universitet.
    Westergren, Karl-Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Perceptions of work environment priorities: Are there any differences by company size? — An ecological study2015In: Work: A journal of Prevention, Assesment and rehabilitation, ISSN 1051-9815, E-ISSN 1875-9270, Vol. 52, no 3, p. 697-706Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Earlier studies suggest that the quality of handling occupational health and safety (OHS) activities differs between companies of different sizes. Company size is a proxy variable for other variables affecting OHS performance.

    OBJECTIVE: The objective of this study was to investigate if there is an association between company size and perceptions of work environment prioritizations.

    METHODS: Data from 106 small- and medium-sized Swedish manufacturing companies was collected. One manager and one safety delegate at each company rated different aspects of their companies' work environment prioritizations with a 43-item questionnaire. Ratings were aggregated to a summary statistic for each company before analysis.

    RESULTS: No significant differences in perceptions of priority were found to be associated with company sizes. This is in contrast to earlier studies of objective differences. The respondents in small companies, however, showed significantly greater consensus in their ratings.

    CONCLUSIONS: Company size does not appear to be associated with perceptions of work environment prioritizations. Company size is an important proxy variable to study in order to understand what factors enable and obstruct safe and healthy workplaces. The work presented here should be viewed as an initial exploration to serve as direction for future academic work.

  • 557.
    Nyman, Teresia
    et al.
    MM Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Centre for Occupational and Environmental Medicine, Stockholm County Council, Sweden; School of Technology and health, KTH Royal Institute of Technology, Stockholm, Sweden.
    Eliasson, Kristina
    MM Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; School of Technology and health, KTH Royal Institute of Technology, Stockholm, Sweden.
    Lindberg, Per
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Forsman, Mikael
    MM Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Centre for Occupational and Environmental Medicine, Stockholm County Council, Sweden.
    A proposed web-based model for teaching risk assessment methods2015In: Proceedings 19th Triennial Congress of the IEA, Melbourne 9-14 August 2015, 2015Conference paper (Refereed)
    Abstract [en]

    During the last decades much research has focused on the association between work-related exposures and musculoskeletal disorders, and a number of risk assessment methods for physical ergonomics have been developed (Neumann 2007, Takala, Pehkonen et al. 2010).

    However, recent studies have shown that the knowledge about these methods is very limited among ergonomists in the occupational health services (OHS). The ergonomists often assess risks in the work environment by sole observation, based on his/her own knowledge and experience, without the use of any specific method (K. Eliasson et al., manuscript). Further, a survey investigating the use of evidence based practice within the OHS concluded that there is a need for education and training in reliable and valid methods (Alipour, Nyman et al. 2012).

    Although there already exist both shorter courses and master programs in ergonomics at university level, there is a lack of more informal, easy-to-access educational material on risk assessment methods.

    Web-based education and training often allows self-directed, self-paced instruction and can be considered a good alternative to traditional learning methods for ergonomists wanting to increase their professional competence. However, there is a lack of studies investigating the pros and cons of using e-learning within this field.

    The present study is part of the OBS-project, an on-going project with the overall purpose to evaluate six observational methods for assessment of biomechanical exposures. The six methods are: Assessment of Repetitive Tasks (ART) (Ferreira, Gray et al. 2009), Hand Arm Risk Assessment Method (HARM) (Douwes and de Kraker 2012), Model for assessment of repetitive work by the Swedish Work Environment Authority (SWEA) (The Swedish Work Environment Authority 2011), Occupational Repetitive Actions (OCRA) checklist (Occhipinti and Colombini 2006), Quick Exposure Check (QEC) (David, Woods et al. 2008), and Strain Index (SI) (Moore and Garg 1995).

    The specific objective of this sub-study was to evaluate a web-based pedagogical model targeting OHS professionals aimed at facilitating the teaching and the dissemination of observational risk assessment methods.

  • 558.
    Nyman, Teresia
    et al.
    IMM Institute of Environmental Medicine, Karolinska Institutet, Stockholm.
    Eliasson, Kristina
    IMM Institute of Environmental Medicine, Karolinska Institutet, Stockholm; School of Technology and health, KTH Royal Institute of Technology, Huddinge.
    Lindberg, Per
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Rehn, Ida-Märta
    Centre for Occupational and Environmental Medicine, Stockholm County Council.
    Kjellberg, Katarina
    IMM Institute of Environmental Medicine, Karolinska Institutet, Stockholm; Centre for Occupational and Environmental Medicine, Stockholm County Council.
    Palm, Peter
    Department of Medical Sciences Occupational and Environmental Medicine, Uppsala University, and Uppsala University Hospital, Sweden.
    Forsman, Mikael
    IMM Institute of Environmental Medicine, Karolinska Institutet, Stockholm; Centre for Occupational and Environmental Medicine, Stockholm County Council .
    A Web-Based Model for Teaching Risk Assessment Methods2014Conference paper (Other academic)
    Abstract [en]

    1.  Introduction

    During the last decades many risk assessment methods for physical ergonomics have been developed. However, recent studies have shown that the knowledge about these methods is very limited among ergonomists in the occupational health services. Although there are both shorter courses and full Master programs on ergonomics on advanced level within the regular educational system (university level), there is a lack of more informal, easy-to-access educational material on different risk assessment methods.

    2.  Methods

    As a part of a larger ongoing project investigating the validity, reliability and usability of six observational methods for risk assessment of repetitive work, a web-based pedagogical model aimed at facilitating the teaching and the dissemination of risk assessment methods has been developed.

    The web-based model consists of recorded lectures and self-supported training using a video library of different work tasks. The model uses a web-based platform originally developed for student-teacher communication in a university setting. The platform supports group discussions and possibilities for interaction with teachers.

    As a part of the project, the model are now being tested, by letting 12 ergonomists from the occupational health services with more than 5 years of experience of ergonomic risk assessments learn six different observational methods for risk assessment of repetitive work. The six methods are:

    1. Occupational Repetitive Actions (OCRA) checklist
    2. Quick exposure checklist Quick Exposure Check (QEC)
    3. Strain Index (SI)
    4. Assessment of Repetitive Tasks (ART)
    5. Hand Arm Risk-assessment Method (HARM)
    6. Model for assessment of repetitive work by the Swedish Work Environment Authority

    After learning the six different methods, the ergonomists are given an evaluation questionnaire, specific for each method. The questionnaires are then used for designing group interviews concerning both the usability of the methods, as well as the web-based pedagogical model.

    3.  Results

    Preliminary questionnaire analyses and interviews indicate that the ergonomists are mainly positive to the present web-based pedagogical model. Group interviews are carried out during spring 2014, and further results will be presented at the conference.

  • 559.
    Oakman, Jodi
    et al.
    Centre for Ergonomics and Human Factors, School of Psychology and Public Health, La Trobe University, Melbourne, Australia.
    Stevens, Matthew
    National Research Centre for the Working Environment, Copenhagen, Denmark.
    Karstad, Kristina
    National Research Centre for the Working Environment, Copenhagen, Denmark.
    Hallman, David
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.
    Rugulies, Reiner
    National Research Centre for the Working Environment, Copenhagen, Denmark.
    Holtermann, Andreas
    National Research Centre for the Working Environment, Copenhagen, Denmark.
    Do organisational and ward-level factors explain the variance in multi-site musculoskeletal pain in eldercare workers? A multi-level cross-sectional study2020In: International Archives of Occupational and Environmental Health, ISSN 0340-0131, E-ISSN 1432-1246Article in journal (Refereed)
    Abstract [en]

    Purpose

    Multi-site musculoskeletal pain (MSP) is highly prevalent among eldercare workers, leading to increased incidence of sickness absence and early retirement. Most research on MSP in eldercare workers has focused on individual-level factors reported by the employees, with limited focus at the organisation and ward level. To address this gap, the aim of this study was to investigate whether organisation and ward-level factors explain the variance in MSP among Danish eldercare workers.

    Methods

    A multi-level cross-sectional study was conducted among 20 Danish nursing homes, containing 126 wards, and 418 workers who participated in measurements of organisational factors, working environment factors, and MSP (classified as reporting pain in 2 or more body regions). Data were collected at the level of the organisation, ward, and individual. The proportion of variance in MSP explained by each level was estimated using variance components analysis. The association between factors at each level of the organisation and MSP was investigated using generalised linear mixed-effects regression.

    Results

    Sixty seven percent of participants reported having MSP. The organisational and ward-level factors explained 0% of the variance in MSP, while the individual-level factors explained 100% of the variance in MSP. Moreover, no factors at the organisational and ward levels showed statistically significant associations with MSP. Individual-level perceived physical exertion and quantitative demands had a statistically significant association with a higher prevalence of MSP.

    Conclusions

    The organisation and ward levels did not contribute to explaining any of the variance in MSP. All variance in MSP was explained at the individual level.

  • 560.
    Palm, Peter
    et al.
    Arbets- och miljömedicin, Akademiska sjukhuset, Uppsala.
    Eliasson, Kristina
    Sensia Företagshälsovård & Enheten för ergonomi, KTH Stockholm.
    Lindberg, Per
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Hägg, Göran
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Belastningsergonomisk riskbedömning: Vägledning och metoder2014Report (Other (popular science, discussion, etc.))
    Download full text (pdf)
    fulltext
  • 561.
    Palm, Peter
    et al.
    Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden.
    Forsman, Mikael
    IMM Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Birk Jørgensen, Marie
    National Research Centre for the Working Environment, Copenhagen, Denmark.
    Madeleine, Pascal
    Department of Health Science and Technology, Aalborg University, Denmark.
    Holtermann, Andreas
    National Research Centre for the Working Environment, Copenhagen, Denmark.
    Whole workday measurements of arm elevation andassociations with neck shoulder pain among blue-collar workers in the DPHACTOcohort2017In: BMC Musculoskeletal Disorders, ISSN 1471-2474, E-ISSN 1471-2474Article in journal (Refereed)
  • 562.
    Palm, Peter
    et al.
    Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University.
    Forsman, Mikael
    IMM Institute of Environmental Medicine, Karolinska Institutet.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Gupta, Nidhi
    National Research Centre for the Working Environment, Copenhagen.
    Holtermann, Andreas
    National Research Centre for the Working Environment, Copenhagen.
    Upper arm elevation in blue‐collar work with and without exclusion of arm elevation during sitting2018Conference paper (Refereed)
    Download full text (pdf)
    Publicerat abstract
  • 563.
    Palm, Peter
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Johansson, Elin
    Department of Public Health Sciences, Karolinska Institutet.
    Kjellberg, Katarina
    Department of Public Health Sciences, Karolinska Institutet.
    Josephson, Malin
    Department of Medical Sciences Occupational and Environmental Medicine, Uppsala University.
    Differences in cashiers work technique regarding wrist movements when scanning groceries2012In: Work: A journal of Prevention, Assesment and rehabilitation, ISSN 1051-9815, E-ISSN 1875-9270, Vol. 41, p. 5436-5438Article in journal (Refereed)
    Abstract [en]

    Checkout cashier work can be repetitive and hand-intensive. Differences in workstyle might explain why some cashiers develop symptoms and other do not. Work technique is one part of the workstyle concept. The aim of this study was to analyze if there were differences in work technique among cashiers in to what extent they use large or small wrist movements when scanning groceries. Wrist movements of 17 cashiers were video recorded. The results revealed large variation among the cashiers in if they use large or small wrist movements when handling the groceries. This indicated there is a potential for some cashiers to improve their work technique.

  • 564.
    Palm, Peter
    et al.
    Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University Hospital.
    Josephson, Malin
    Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University Hospital.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Kjellberg, Katarina
    Unit of Occupational Medicine, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Centre for Occupational and Environmental Medicine, Stockholm County Council, Stockholm, Sweden .
    Reliability and criterion validity of an observation protocol for working technique assessments in cash register work2016In: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847, Vol. 59, no 6, p. 829-839Article in journal (Refereed)
    Abstract [en]

    We evaluated the intra- and inter-observer reliability and criterion validity of an observation protocol, developed in an iterative process involving practicing ergonomists, for assessment of working technique during cash register work for the purpose of preventing upper extremity symptoms. Two ergonomists independently assessed 17 15-min videos of cash register work on two occasions each, as a basis for examining reliability. Criterion validity was assessed by comparing these assessments with meticulous video-based analyses by researchers. Intra-observer reliability was acceptable (i.e. proportional agreement >0.7 and kappa>0.4) for 10/10 questions. Inter-observer reliability was acceptable for only 3/10 questions. An acceptable inter-observer reliability combined with an acceptable criterion validity was obtained only for one working technique aspect ‘Quality of movements’. Thus, major elements of the cashiers’ working technique could not be assessed with an acceptable accuracy from short periods of observations by one observer, such as often desired by practitioners.

  • 565.
    Palmerud, Gunnar
    et al.
    Occupational and Environmental Medicine, University of Gothenburg, Sweden.
    Forsman, Mikael
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Neumann, Patrick
    Department of Mechanical and Industrial Engineering, Ryerson University, Toronto, Canada.
    Winkel, Jörgen
    Department of Sociology and Work Science, University of Gothenburg, Sweden.
    Mechanical exposure implications of rationalization: A comparison of two flow strategies in a Swedish manufacturing plant2012In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 43, no 6, p. 1110-1121Article in journal (Refereed)
    Abstract [en]

    The aim of this case study was to (1) investigate differences in mechanical exposure (i.e. mechanical forces arising in the body of the operator) between two production strategies: long-cycle parallelised flow assembly (OLD) and conventional serial flow assembly (NEW), and (2) estimate potential changes in job exposure as a consequence of waste reduction when rationalising a line system.

    Data on postures, movements and whole body exposure were collected during an ordinary working shift, by means of video recordings synchronised to direct technical measurements of six professional operators.

    The results revealed the machine paced NEW system to have slower movements with less time spent in movements of high velocity compared to the self-paced OLD system. No significant differences were found between time-median posture levels. ‘Disturbances’ in the NEW system offered lower mechanical risk exposures compared to direct assembly work. Modelling the removal of wasteful ‘disturbances’ revealed both an increase in risk-implying fast movements and decrease in recovery-implying periods at low velocity – effectively isolating a work intensification. This study helps expose the complex relationship between rationalizations and mechanical exposure for system operators

  • 566. Paquet, V L
    et al.
    Mathiassen, Svend Erik
    University of Gävle, Centre for Musculoskeletal Research.
    Dempsey, P G
    Video-Based Ergonomic Job Analysis: A Practitioner's Guide2006In: Professional safety, ISSN 0099-0027, Vol. 51, no 11, p. 27-35Article in journal (Refereed)
    Abstract [en]

    The article examines the use of video-based ergonomic job analysis to systematically identify hazards thought to result in work-related musculoskeletal disorders. The identification of ergonomics problems via systematic analysis of video recordings that are made on a sample of work. Little attention has been given to ensuring that videos contain a representative sample of the biomechanical stressors that are likely to vary from one person to another, and over time with different work methods or productivity demands.

  • 567.
    Paquet, Victor
    et al.
    Department of Industrial & Systems Engineering, University at Buffalo, SUNY.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Ability of limited exposure sampling to describe exposure effects of ergonomics interventions2007Conference paper (Other academic)
  • 568. Passatore, Magda
    et al.
    Hellström, Fredrik
    University of Gävle, Centre for Musculoskeletal Research.
    Roatta, S.
    The role of the sympathetic nervous system in stress and pain2004In: International Congress on Chronic Pain and Dysfunction after Whiplash and other Traumatic Neck Injuries / [ed] Djupsjöbacka, M., Johansson, H B., Mathiassen, S E., Sjölander, P., Centre for Musculoskeletal Research, Gävle, Sweden: Gefle University Press , 2004, p. 16-26Chapter in book (Other academic)
  • 569.
    Paulin, Johan
    et al.
    Department of Psychology, Umeå University, Umeå, Sweden.
    Andersson, Linus
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research. Department of Psychology, Umeå University, Umeå, Sweden.
    Nordin, Steven
    Department of Psychology, Umeå University, Umeå, Sweden.
    Characteristics of hyperacusis in the general population2016In: Noise & Health, ISSN 1463-1741, E-ISSN 1998-4030, Vol. 18, no 83, p. 178-184Article in journal (Refereed)
    Abstract [en]

    There is a need for better understanding of various characteristics in hyperacusis in the general population. The objectives of the present study were to investigate individuals in the general population with hyperacusis regarding demographics, lifestyle, perceived general health and hearing ability, hyperacusis-specific characteristics and behavior, and comorbidity. Using data from a large-scale population-based questionnaire study, we investigated individuals with physician-diagnosed (n = 66) and self-reported (n = 313) hyperacusis in comparison to individuals without hyperacusis (n = 2995). High age, female sex, and high education were associated with hyperacusis, and that trying to avoid sound sources, being able to affect the sound environment, and having sough medical attention were common reactions and behaviors. Posttraumatic stress disorder, chronic fatigue syndrome, generalized anxiety disorder, depression, exhaustion, fibromyalgia, irritable bowel syndrome, migraine, hearing impairment, tinnitus, and back/joint/muscle disorders were comorbid with hyperacusis. The results provide ground for future study of these characteristic features being risk factors for development of hyperacusis and/or consequences of hyperacusis.

  • 570.
    Persson, Lina
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Jahncke, Helena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Variation i arbetet: växlingar mellan fysiska och mentala arbetsuppgifter: Företag A2017Report (Other academic)
  • 571.
    Persson, Lina
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Jahncke, Helena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Variation i arbetet: växlingar mellan fysiska och mentala arbetsuppgifter: Företag B2017Report (Other academic)
  • 572.
    Persson, Lina
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Jahncke, Helena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Variation i arbetet: växlingar mellan fysiska och mentala arbetsuppgifter: Företag C2017Report (Other academic)
  • 573.
    Persson, Lina
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Jahncke, Helena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Variation i arbetet: växlingar mellan fysiska och mentala arbetsuppgifter: Företag D2017Report (Other academic)
  • 574.
    Picchiottino, Mathieu
    et al.
    CIAMS, Université Paris-Sud, Université Paris-Saclay, Orsay Cedex, France.
    Honore´, Margaux
    CIAMS, Université Paris-Sud, Université Paris-Saclay, Orsay Cedex, France.
    Leboeuf-Yde, Charlotte
    Institute for Regional Health Research, University of Southern Denmark, Odense, Denmark.
    Gagey, Olivier
    CIAMS, Université Paris-Sud, Université Paris-Saclay, Orsay Cedex, France.
    Cottin, Francois
    CIAMS, Université Paris-Sud, Université Paris-Saclay, Orsay Cedex, France.
    Hallman, David
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.
    The effect of a single spinal manipulation on cardiovascular autonomic activity and the relationship to pressure pain threshold: a randomized, cross-over, sham-controlled trial2020In: Chiropractic and Manual Therapies, ISSN 2045-709X, E-ISSN 2045-709X, Vol. 28, article id 7Article in journal (Refereed)
    Abstract [en]

    Background

    The autonomic nervous system interacts with the pain system. Knowledge on the effects of high velocity low amplitude spinal manipulations (SM) on autonomic activity and experimentally induced pain is limited. In particular, the effects of SM on autonomic activity and pain beyond the immediate post intervention period as well as the relationship between these two outcomes are understudied. Thus, new research is needed to provide further insight on this issue.

    Objectives

    The aim was to assess the effect of a single SM (i.e. SM vs. sham) on cardiovascular autonomic activity. Also, we assessed the relationship between cardiovascular autonomic activity and level of pain threshold after the interventions.

    Method

    We conducted a randomized, cross-over, sham-controlled trial on healthy first-year chiropractic students comprising two experimental sessions separated by 48 h. During each session, subjects received, in a random order, either a thoracic SM or a sham manipulation. Cardiovascular autonomic activity was assessed using heart rate and systolic blood pressure variabilities. Pain sensitivity was assessed using pressure pain threshold. Measurements were performed at baseline and repeated three times (every 12 min) during the post intervention period. Participants and outcome assessors were blinded. The effect of the SM was tested with linear mixed models. The relationship between autonomic outcomes and pressure pain threshold was tested with bivariate correlations.

    Results

    Fifty-one participants were included, forty-one were finally analyzed. We found no statistically significant difference between SM and sham in cardiovascular autonomic activity post intervention. Similarly, we found no post-intervention relationship between cardiovascular autonomic activity and pressure pain threshold.

    Conclusion

    Our results suggest that a single SM of the thoracic spine has no specific effect on cardiovascular autonomic activity. Also, we found no relationship between cardiovascular autonomic activity and pressure pain threshold after the SM. Further experimental research should consider the use of several markers of autonomic activity and a more comprehensive pain assessment.

    Trial registration

    N° NCT03273868. Registered September 6, 2017

  • 575.
    Picchiottino, Mathieu
    et al.
    CIAMS, Université Paris-Sud, Université Paris-Saclay, Orsay Cedex, France.
    Leboeuf-Yde, Charlotte
    Institute for Regional Health Research, University of Southern Denmark, Odense, Denmark.
    Gagey, Olivier
    CIAMS, Université Paris-Sud, Université Paris-Saclay, Orsay Cedex, France..
    Hallman, David
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.
    The acute effects of joint manipulative techniques on markers of autonomic nervous system activity: a systematic review and meta-analysis of randomized sham-controlled trials2019In: Chiropractic and Manual Therapies, ISSN 2045-709X, E-ISSN 2045-709X, Vol. 27, article id 17Article in journal (Refereed)
    Abstract [en]

    BackgroundThe autonomic nervous system (ANS) interests many chiropractors and manual therapists, because joint manipulative techniques (JMT), e.g. high velocity low amplitude (HVLA) manipulations and mobilizations, appear to produce acute changes in ANS mediated physiology. The complexity of this issue justifies a systematic critical literature review.

    ObjectiveTo review the literature comparing the acute changes in markers of ANS activity between JMT applied on spinal or peripheral joints and a sham procedure in healthy or symptomatic subjects.

    MethodWe searched PsycINFO, PEDro, PubMed, Cochrane library, EMBASE, and Medline up to December 2017. We updated the search with PubMed, Cochrane library, EMBASE, and Medline including July 2018. Inclusion criteria were: randomized sham-controlled trials assessing the effect of JMT on markers of ANS activity; manually applied JMT, regardless of technique, applied on either healthy or symptomatic humans; outcome measurements recorded at baseline and repeated during and/or after interventions. Selection of articles and data extraction were performed independently by two reviewers. The quality of studies was assessed using the Cochrane ‘risk of bias’ tool and a technical check-list. Results were reported narratively with some meta-analyses. The Cochrane GRADE approach was used to assess the certainty of evidence.

    ResultsTwenty-nine of 2267 studies were included in the synthesis. Mobilizations (oscillatory technique) probably produce an immediate and short-term, bilateral increase in skin sympathetic nerve activity (reflected by an increase in skin conductance) regardless of the area treated (moderate-certainty evidence). It is uncertain whether the sympathetic arousal also explains an increase in respiratory rate (very low-certainty evidence). Our evaluation of the literature suggests that spinal sustained apophyseal glides (SNAGs) mobilization and HVLA manipulation of the spine may have no acute effect on the studied markers of ANS activity (very low- to low-certainty evidence).

    ConclusionSome types of mobilizations probably produce an immediate and short-term, statistically significant increase in skin sympathetic nerve activity when compared to a sham procedure, whereas spinal SNAGs and spinal HVLA techniques may have no acute effect on the studied markers of ANS activity. No region-specific results were noted. The literature suffers from several shortcomings, for which reason we strongly suggest further research.

  • 576.
    Pulido, Jean Alexander
    et al.
    Centro de Estudios de Ergonomía, Department of Industrial Engineering, School of Engineering, Pontificia Universidad Javeriana, Bogotá.
    Barrero, Lope Hugo
    Centro de Estudios de Ergonomía, Department of Industrial Engineering, School of Engineering, Pontificia Universidad Javeriana, Bogotá.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Dennerlein, Jack
    Department of Physical Therapy, Movement, and Rehabilitation Sciences, Bouvé College of Health Sciences, Northeastern University, Boston.
    Correctness of self-reported task durations: a systematic review: a systematic review2018In: Annals of Occupational Hygiene, ISSN 0003-4878, E-ISSN 1475-3162, Vol. 62, no 1, p. 1-16Article in journal (Refereed)
    Abstract [en]

    Background: Durations of tasks in a job is an essential interest in occupational epidemiology. Such durations are frequently measured using self-reports, which may, however, be associated with both bias and random errors. The present systematic literature review examines the correctness of self-reported durations of tasks, i.e. the extent to which they differ from more valid reference data due to either systematic or random error, and factors influencing this correctness, with particular emphasis on assessment of exposures of relevance to musculoskeletal disorders.

    Method: The search for relevant studies included the databases ISI web of Science, Medline, EBSCO HOST, Proquest and Psycnet.

    Results: Thirty-two articles were identified, 23 of which examined occupational tasks and nine non-occupational tasks. Agreement between self-reports and a more correct reference was reported for, in total, 182 tasks. Average proportional errors were, for most tasks, between -50% (i.e. underestimations) and +100%, with a dominance of overestimations; 22% of all results considered overestimations of 100% or more. For 15% of the 182 reported tasks, the mean difference between the self-reported and the reference duration value was less than 5%, and 20% of the 182 mean differences were between 5% and 20%. In general, respondents were able to correctly distinguish tasks of a longer duration from shorter tasks, even though the actual durations were not correct. A number of factors associated with the task per se appeared to influence agreement between self-reports and reference data, including:  type of task, true task duration, task pattern across time (continuous vs. discontinuous), and whether the addressed task is composed of subtasks. The musculoskeletal health status of the respondent did not have a clear effect on the ability to correctly report task durations. Studies differed in key design characteristics and detail of information reported, which hampers a formal aggregation of results.

    Discussion: The correctness of self-reported task durations is, at the best, moderate at the individual level, and this may present a significant problem when using self-reports in task-based assessment of individual job exposures. However, average self-reports at the group level appear reasonably correct, and may thus be a viable method in studies addressing, for instance, the relative occurrence of tasks in a production system. Due to the disparity of studies, definite conclusions on the quantitative effect on agreement of different modifiers are not justified, and we encourage future studies specifically devoted to understanding and controlling sources of bias in self-reported task durations. We also encourage studies developing decision support for when to apply or avoid self-reports to measure task durations, depending on study purpose and occupational setting.

  • 577.
    Pulido, Jean Alexander
    et al.
    Centro de Estudios de Ergonomía, Department of Industrial Engineering, School of Engineering, Pontificia Universidad Javeriana, Bogotá, Colombia.
    Barrero, Lope Hugo
    Centro de Estudios de Ergonomía, Department of Industrial Engineering, School of Engineering, Pontificia Universidad Javeriana, Bogotá, Colombia.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Dennerlein, Jack
    Department of Physical Therapy, Movement, and Rehabilitation Sciences, Bouvé College of Health Sciences, Northeastern University, Boston, MA, USA.
    Torres, Paola
    Academic Research, Sede Santa Bárbara, Javesalud-IPS, Bogotá, Colombia.
    Bernal, Luis Gabriel
    Academic Research, Sede Santa Bárbara, Javesalud-IPS, Bogotá, Colombia.
    Differences in the accuracy of self-reported task durations between workers with and without acute non-specific low-back pain2015In: Proceedings of the 19th Triennial Congress of the International Ergonomics Association, Melbourne 9-14 August 2015, 2015Conference paper (Refereed)
  • 578.
    Pulido, Jean Alexander
    et al.
    Department of Industrial Engineering, Pontificia Universidad Javeriana, Bogotá.
    Barrero, Lope
    Department of Industrial Engineering, Pontificia Universidad Javeriana, Bogotá.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Dennerlein, Jack
    Bouvé College of Health Science, Northeastern University, Boston.
    Torres, Paola
    Javesalud, Health service provider, Bogota.
    Berna, Luis Gabriel
    Javesalud, Health service provider, Bogota.
    Low back pain affects self-reported task durations: results of an experimental study2016Conference paper (Refereed)
    Abstract [en]

    Background. Self-reported task durations are frequently used as input when assessing exposures related to musculoskeletal disorders (MSDs), in spite of being associated with errors. This work aimed to estimate the extent to which low-back pain status, true task duration, biomechanical load and pace influence errors in self-reported task durations.

    Methods. 48 workers with—and 48 workers without— low-back pain, matched by gender, age group and job type, were recruited through a health service provider. T-tests con-firmed that matching was successful. Each worker performed three standardized tasks—i.e. shelving boxes, filing journals and typing texts—in a combination of the following conditions: one of three durations (60, 80 or 100 minutes); two paces in shelving (walking at 3 km/hr vs. 6 km/hr); and two loads in shelving (box weight 1.25 vs. 2.5 kg). Partici-pants were asked about the perceived duration of each task immediately after the work session while being aware of the total duration of the session. Posture and kinematics of the back (iLMM™) and heart rate (portable Polar®) were monitored throughout sessions.

    Results. Regression analyses indicated that task type, true task duration and low-back pain status affect errors in self-reported task durations. Workers with low-back pain overestimated the shelving task more than workers without pain, by 15 to 36 minutes, depending on the true duration of the task. This occurred at the expense of a larger underestimation of the other two tasks, and mainly the typing task.

    Discussion. Since errors in self-reported task duration appear to be significantly de-pendent on the worker’s musculoskeletal pain status, as well as factors in the job, we recommend that efforts be made to correct such errors by calibration modeling, or, at a minimum, that researchers be aware of this potential effect on exposure assessments and on epidemiological research that deals with work-related MSDs.

  • 579.
    Radovanovic, Sasa
    et al.
    University of Gävle, Centre for Musculoskeletal Research.
    Day, Scott Jason
    Johansson, Håkan
    University of Gävle, Centre for Musculoskeletal Research.
    The impact of whole-hand vibration exposure on the sense of angular position about the wrist joint2006In: International Archives of Occupational and Environmental Health, ISSN 0340-0131, E-ISSN 1432-1246, Vol. 79, no 2, p. 153-160Article in journal (Refereed)
    Abstract [en]

    OBJECTIVES: The purpose of this research is to determine the impact of whole-hand vibration on the capacity of subjects to identify previously presented positions of the hand in both wrist flexion and extension. METHODS: In each movement direction, targets of 15 or 30 degrees were presented with an imposed passive movement from the start position. During the second imposed movement, subjects were required to identify when the target position had been reached. For the vibration condition, 15 s of whole-hand vibration exposure was repeated immediately prior to each target position trial. Proprioceptive capacity was assessed by comparing the identified angular position with the reference position-angular distance expressed in terms of absolute error (AE), constant error (CE), and variable error (VE). RESULTS: For three of the four target positions (15 and 30 degrees flexion and 15 degrees extension), the absolute, constant, and VEs of target identification were insensitive to vibration, whereas for the 30 degrees extension target, both the absolute and CE were significantly different before and after the vibration application, showing the subjects overshooting previously presented target position. All three error measures were larger for the long targets than the short targets. CONCLUSIONS: Short-duration exposure to whole-hand vibration is insufficient to compromise post-vibration position sense in the wrist joint, except near the end range of joint movement in wrist extension. Complement contribution of different proprioceptive receptors (muscle, joint, and skin receptors) seems to be crucial for accuracy to reproduce passive movements, since the capacity of any individual class of receptor to deliver information about movement and position of the limbs is limited.

  • 580.
    Radovanovic, Sasa
    et al.
    University of Gävle, Centre for Musculoskeletal Research.
    Dragasevic, N T
    Maric, J
    Milanovic, S
    Ljubisavljevic, Milos
    University of Gävle, Centre for Musculoskeletal Research.
    Kostic, V S
    Effects of transcranial magnetic stimulation of the cerebellum on performance of consecutive rapid movements in patients with idiopathic sporadic cerebellar ataxia and healthy subjects2006In: The Movement Disorder Society’s 10th International Congress of Parkinson’s Disease and Movement: October 28 - November 2, Kyoto, Japan, 2006Conference paper (Other (popular science, discussion, etc.))
    Abstract [en]

    It is known that cerebellum influences the action of the motor system. The cerebellum may exert a facilitatory influence in the motor cortex, and should be involved in temporal computations in movement performance. The inability to compute time differences would affect time-related tasks. However, the cerebellar role to control precise movement performance is contradictory. Furthermore, facilitatory effect of cerebellum might be decreased in cerebellar degeneration. The aim of the study was to investigate the performance of the rapid movements in patients with “pure” cerebellar ataxia.

    Movement performance was compared in 13 patients and 8 healthy subjects. Movements were performed from the initial to the target position, with the movement length of 40 deg in the elbow flexion. Motor threshold (MT) of the motor cortex was determined and TMS was then applied right of the inion, in two conditions: With the strength of 5% below the MT, at the moment of command to start the flexion movement, and with the same strength 20 ms before the movement start. Two additional conditions were also tested: TM stimulus was applied with the strength of 30% above the MT at the moment of movement start, and at 20 ms before movement start.

    Patients perform significantly longer movements then healthy subjects, and accuracy of the movements deteriorates. Length of the movements was also prolonged in the conditions where stronger stimulus was applied. Accuracy of the movements in patients was not different when the stimulus was applied in the phase of the movement preparation, compared in moment 0 and -20 ms. Same was true for healthy subjects in both conditions - stimulus below and above MT.

    Results that differences in disturbance timing and strength have no clear effects might speak for preprogrammed characteristics of rapid movements in both healthy subjects and ataxia patients, where sensory input is not of primary importance. Deficits in cerebellar ataxia for the movement length may be attributable to improper processing of motor command and/or sensory information.

  • 581.
    Rashid, Mamunur
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.
    Women on sick leave for long-term musculoskeletal pain: Factors associated with work ability, well-being and return to work2019Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Background: Taking sick leave (SL) for long-term musculoskeletal pain (MSP), predominantly in the neck, shoulders and back, is common among women in Sweden. Long-term MSP affects their daily life and causes impaired work ability and long-term SL. Therefore, it is necessary to work from a multidimensional perspective to generate knowledge about factors that may obstruct or promote work ability and well-being in the return-to-work (RTW) process among women on SL for MSP. The aim of the thesis was to identify factors of importance for work ability, well-being and RTW among women on SL for long-term neck/shoulder and/or back pain.

          Methods: Study I is a narrative systematic review. An extensive systematic search was performed through the databases Medline, CINAHL and PsycINFO, from their inception until February 2016. The inclusion criteria for the articles were: study population of men and women aged 18-65 years, work absence ≥ 2 weeks, and neck/shoulder or back pain. The outcome variable was RTW. An additional search through reference lists and citations of the included articles was performed in Scopus. A total of 10 studies were selected for the methodological quality assessment and synthesis of the results. Data were synthesized through analysis of the content according to similarities of factors. For Study II-IV, a postal survey was sent to 600 women in central and northern Sweden who were receiving time-loss benefits during the spring of 2016. The inclusion criteria were women aged 18-65 years, ≥ 50% SL from service, SL ≥ 1 month due to neck/shoulder and/or back pain (≥ 3 months), and understanding the Swedish language. The exclusion criteria were rheumatoid arthritis, multiple sclerosis, stroke, cancer, Parkinson, bipolar disease, schizophrenia, and pregnancy. A follow-up survey was sent out in spring 2017 to the 208 women who answered the survey at baseline; 141 responded. Study II was cross-sectional; a multiple linear regression was conducted to determine the association between the factors and work ability and well-being, respectively. Study III had  a prospective design with a 1-year follow-up. A multiple logistic regression was conducted to determine whether work ability and well-being predicted RTW. To assess the discriminative ability of the Work Ability Index (WAI) and Life Satisfaction questionnaire (LiSat-11) regarding women who did RTW and those who did not RTW (NRTW), Receiver Operating Characteristic (ROC) curves were used. Study IV also had a prospective design with a 1-year follow-up. Cluster analysis was performed to identify potential predictors, and a multiple logistic regression model was used to identify significant predictors of RTW.

          Results: Study I suggested that recovery beliefs, health-related factors and work capacity may be important areas to target in interventions for women and men with long-term neck or back pain. The review also showed that there is a lack of high-quality studies. Study II showed that believing one would return to the same work within 6 months, pain intensity and job strain were associated with work ability among women on SL for long-term neck/shoulder and/or back pain. Self-efficacy and depression were associated with well-being. The findings from Study III indicated that work ability was important for RTW in this group of women. The WAI adequately discriminated between RTW and NRTW. The LiSat-11 did not predict RTW or discriminate between RTW and NRTW. The results from Study IV indicated that coping through increasing behavioral activities, believing one would return to the same work within 6 months, and social support outside work predicted RTW in this group of women.

          Conclusions: The results from the empirical studies on women only were partly in agreement with results found in the narrative systematic review on men and women. In light of this, future studies may benefit from investigating prognostic factors for RTW among men and women separately. Factors that emerged in the empirical studies would need to be tested in a weighted model to identify whether any of them mediate or moderate the outcome variable RTW.

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  • 582.
    Rashid, Mamunur
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.
    Heiden, Marina
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.
    Nilsson, Annika
    University of Gävle, Faculty of Health and Occupational Studies, Department of Caring Science, Caring Science.
    Kristofferzon, Marja-Leena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Caring Science, Caring Science.
    Do work ability and well-being matter for return to work?: Cut-off points for Work Ability Index and Life Satisfaction questionnaire among women with long-term musculoskeletal painManuscript (preprint) (Other academic)
    Abstract [en]

    Objectives: To determine whether work ability and well-being predict return to work (RTW) among women with long-term neck/shoulder and/or back pain at a 1-year follow-up, and to assess the ability of the Work Ability Index (WAI) and Life Satisfaction questionnaire (LiSat-11) to discriminate between those who did RTW and those who did not RTW. 

    Methods: A survey was sent to 600 women receiving time-loss benefits from the Swedish Social Insurance Agency. In total, 208 women responded at baseline, and 141 at a 1-year follow-up. To identify whether work ability and well-being predicted RTW, multiple logistic regression analyses were performed with and without adjustment for type of work and pain intensity. To assess the discriminative ability of the WAI and LiSat-11 for women who did RTW and those who did not RTW, Receiver Operating Characteristic curves were fitted.  

    Results: Work ability predicted RTW, and the results remained significant after adjusting for type of work and pain intensity (OR 1.12, 95% CI: 1.04-1.22). Well-being was not significant. The WAI at baseline adequately discriminated between RTW and no RTW after one year (AUC 0.78, 95% CI 0.70-0.86), but the LiSat-11 did not.

    Conclusions: Our results indicate that work ability is an important factor for RTW among women on SL for long-term neck/shoulder and/or back pain. The WAI has adequate discriminatory ability in this population, but the LiSat-11 has not.  

     

    Keywords: Life satisfaction, Musculoskeletal pain, Sickness absence, Work status

  • 583.
    Rashid, Mamunur
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Kristofferzon, Marja-Leena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Caring science.
    Heiden, Marina
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Nilsson, Annika
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Caring science. Department of Public Health and Caring Sciences, Faculty of Medicine, Uppsala University, Uppsala, Sweden.
    Factors related to work ability and well-being among women on sick leave due to long-term pain in the neck/shoulders and/or back: a cross-sectional study2018In: BMC Public Health, ISSN 1471-2458, E-ISSN 1471-2458, Vol. 18, no 1, article id 672Article in journal (Refereed)
    Abstract [en]

    BACKGROUND:

    Musculoskeletal pain is one of the leading causes of sick leave, especially among women, in Western countries. The aim of the present study was to identify factors associated with work ability and well-being, respectively, among women on sick leave due to long-term pain in the neck/shoulders and/or back.

    METHODS:

    A cross-sectional study with a correlational design was conducted on women who were sick-listed due to long-term pain in the neck/shoulders and/or back. A total of 208 participants responded to a survey comprising eight instruments: Multidimensional Pain Inventory scale, General Self-Efficacy scale, Sense of Coherence scale, Coping Strategies Questionnaire, Demand-Control-Support Questionnaire, Hospital Anxiety and Depression Scale, Work Ability Index and Life Satisfaction questionnaire. Multiple linear regression analyses were performed to identify factors associated with work ability and well-being, respectively.

    RESULTS:

    Women who more strongly believed they would return to the same work had greater work ability (β = 0.39, p < 0.001), whereas women with higher pain intensity (β = - 0.30, p < 0.001) and higher job strain (β = - 0.12, p < 0.05) had lower work ability. Women with higher self-efficacy rated greater well-being (β = 0.14, p < 0.05). As the women's scores for depression increased, their well-being decreased by 48%, which was statistically significant (p < 0.001). The regression models for work ability and well-being were significant (p < 0.001), and their adjusted R- square values were 48% and 59%, respectively.

    CONCLUSIONS:

    The study suggests that the factors beliefs to be back at the same work, pain intensity and job strain are predictive of work ability. Moreover, the factors self-efficacy and depression seem to be predictive of well-being. The findings highlight factors that should be considered by health care professionals and policy-makers to guide attempts to reduce sick leave.

  • 584.
    Rashid, Mamunur
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.
    Kristofferzon, Marja-Leena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Caring Science, Caring Science.
    Heiden, Marina
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.
    Nilsson, Annika
    University of Gävle, Faculty of Health and Occupational Studies, Department of Caring Science, Caring Science.
    Predictors of return to work among women with long-term neck/shoulder and/or back pain: a 1-year prospective studyManuscript (preprint) (Other academic)
    Abstract [en]

    Objective: The aim of this study was to identify predictors of return to work (RTW) among women on sick leave due to long-term neck/shoulder and/or back pain.

    Methods: The study was a prospective survey with a 1-year follow-up. Data on predictors and outcome were collected using a self-administrated questionnaire containing eight instruments – Coping Strategies Questionnaire, General Self-Efficacy scale, Sense of Coherence, Multidimensional Pain Inventory, Hospital Anxiety and Depression Scale, Demand-Control-Support Questionnaire, Work Ability Index, and Life Satisfaction questionnaire, as well as a set of background questions. A total of 208 women, aged 23-63 years, were included at baseline, and 141 responded at the 1-year follow-up. Multiple logistic regression analyses were performed to identify predictors of RTW.

    Results: Of the 141 women, 94 had RTW and 47 had not at the 1-year follow-up. Women who engaged in more coping by increasing behavioral activities, such as leisure activities, reading and socialization, (OR 1.12, 95% CI 1.02-1.22) and those who more strongly believed they would return to the same work within 6 months (OR 1.24, 95% CI 1.12-1.38) had an increased probability of RTW. Getting more social support outside work (OR 0.49, 95% CI 0.26-0.90) decreased the odds of RTW at the 1-year follow-up.

    Conclusions: The findings suggested that behavioral activities, belief in returning to the same work and social support were predictors of RTW at the 1-year follow-up. Healthcare professionals should consider these predictors in efforts to prevent prolonged sick leave and to promote RTW among women with long-term neck/shoulder and/or back pain.

     

     

    Key terms: Follow-up study, musculoskeletal pain, prognostic factors, sickness absence, return to work.

     

  • 585.
    Rashid, Mamunur
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Kristofferzon, Marja-Leena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Caring science.
    Heiden, Marina
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Nilsson, Annika
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Caring science.
    Predictors of work ability among women on long-term sick leave due to musculoskeletal pain2017In: NES2017 conference proceedings / [ed] Anna-Lisa Osvalder, Mikael Blomé and Hajnalka Bodnar, 2017, p. 140-Conference paper (Refereed)
    Abstract [en]

    Background: Musculoskeletal pain is one of the leading causes of sick leave (SL), especially among women in Sweden and in other western countries. It is, therefore, important to know which health- and work-related factors are associated with work ability (WA) among women with long-term musculoskeletal pain.

         Purpose: The aim of this study was to determine whether there is any association between self-efficacy, anxiety, depression, sense of coherence, job strain, support at work, pain intensity, physical activity, beliefs to be back at the same work, coping strategies, and WA.

         Methods: A cross-sectional study was conducted on women with long-term pain who were on SL. Inclusion criteria: (i) age 18-65 years, (ii) SL: ≥ 1 months, (iii) SL: ≥ 50%, (iv) pain in neck, shoulder or back (≥ 3 months), and (v) understanding Swedish. Exclusion criteria: (i) rheumatoid arthritis, (ii) multiple sclerosis, (iii) stroke, (iv) cancer, (v) Parkinson, (vi) bipolar disease, (vii) schizophrenia, (viii) pregnancy. In spring 2016, self-administered questionnaires were sent out to 600 women who were receiving time-loss benefits according to the Swedish Social Insurance registers. Out of these, a total of 208 participants responded and were included in the analysis. For assessing the predictors and the outcome, seven instruments were used: General Self-Efficacy, Hospital Anxiety and Depression Scale, Demand-Control-Support Questionnaire, Sense of Coherence, Multidimensional Pain Inventory, Coping Strategy Questionnaire and Work Ability Index. Two of the predictors, physical activity and beliefs to be back at the same work, were measured by single questions. Multiple linear regression analyses were performed to detect which of the factors were associated with WA.

         Results: Women who more strongly believed that they would return to the same work within 6 months had higher WA (β= 0.39, p < .001), whereas women with higher pain intensity (β= -0.28, p < .001) and higher job strain (β= -0.12, p < .05) had lower WA. The results did not change when age, cohabitant, economic situation and social support were controlled for in the analysis. The regression model was significant (p < .0001), and its adjusted R- square was 48%.

         Discussion and practical implications: Women’s positive beliefs are associated with higher WA in accordance with previous studies. Our study also found that pain intensity and high job strain are associated with reduced WA. The results suggest that health care providers and employers should take women’s beliefs to be back at the same work into account for supporting them to return to work. Furthermore, the focus of rehabilitation program should be on women suffering from high pain intensity to increase WA.

         Conclusion: This study showed that beliefs to be back at the same work, pain intensity and job strain might be predictors of WA. Further studies are needed to identify if these predictors are also important for WA among women with long-term pain who are at work.

     

    Key words: Factors, ability to work, sickness absence, women and pain

  • 586.
    Rashid, Mamunur
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Kristofferzon, Marja-Leena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Caring science. Department of Public Health and Caring Sciences, Faculty of Medicine, Uppsala University, Sweden .
    Heiden, Marina
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Nilsson, Annika
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Caring science. Department of Public Health and Caring Sciences, Faculty of Medicine, Uppsala University, Sweden .
    Work ability, well-being and return-to-work among women in Gävleborg on sick leave due to long-term pain in the neck/shoulders and/or back2018In: FALF KONFERENS 2018 Arbetet – problem eller potential för en hållbar livsmiljö?   10-12 juni 2018 Gävle: Program och abstracts / [ed] Per Lindberg, Gävle: Gävle University Press , 2018, p. 68-Conference paper (Refereed)
    Abstract [en]

    Background

    Sickness absence due to long-term musculoskeletal pain (MSP) is a common phenom-enon in Sweden as well as in other European countries. Sick leave due to MSP (i.e. pain in the neck/shoulders and/or back) is higher among women than among men; therefore, women can be considered as a vulnerable group.

    Aim

    The overall aim is to identify factors of importance for work ability, well-being and return to work among women of working age who are on sick leave due to long-term pain in the neck/shoulders and/or back. The project includes three empirical studies.

    Methods

    The project was a result of a joint collaboration between the University of Gävle and the Swedish Social Insurance Agency in Gävleborg. Initially, a postal survey was sent to 600 women in Gävleborg who were receiving time-loss benefits during spring 2016. The inclusion criteria were: women aged 18-65 years, ≥ 50% sick leave from service, sick leave ≥ 1 month due to pain in the neck/shoulders and/or back (≥ 3 months) and understanding the Swedish language. The exclusion criteria were: rheumatoid arthritis, multiple sclerosis, stroke, cancer, Parkinson, bipolar disease, schizophrenia and preg-nancy. After 12 months, a follow-up survey was sent to the 208 women who answered the survey at baseline, and 141 responded.

    Results

    Study-I aimed to identify factors associated with work ability and well-being among women on sick leave. The results showed that beliefs to be back at the same work, pain intensity and job strain correlated with work ability. Self-efficacy and depression correlated with well-being. Study-II aimed to compare work ability and well-being over time, among women who returned to work (RTW) versus women who remained on sick leave in one year. The findings indicated that out of 141 women, 94 did RTW and 47 remained on sick leave. The group that RTW improved in work ability as well as well-being over time, whereas the group that remained on sick leave tended to decline over time in well-being. Study-III aims to identify predictors of RTW among women on sick leave. The analysis is under way. This project highlights factors that should be considered by health care professionals and policy-makers to guide attempts to reduce sick leave in this vulnerable group.

  • 587.
    Rashid, Mamunur
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Kristofferzon, Marja-Leena
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Caring science. Uppsala University, Uppsala, Sweden.
    Nilsson, Annika
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Caring science. Uppsala University, Uppsala, Sweden.
    Heiden, Marina
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Factors associated with return-to-work among people on work absence due to long-term neck or back pain: a narrative systematic review2017In: BMJ Open, ISSN 2044-6055, E-ISSN 2044-6055, Vol. 7, no 6, article id e014939Article, review/survey (Refereed)
    Abstract [en]

    OBJECTIVE:

    The purpose of this narrative systematic review was to summarise prognostic factors for return to work (RTW) among people with long-term neck/shoulder or back pain.

    METHODS:

    A systematic literature search was performed through three databases (Medline, CINAHL and PsycINFO) for studies published until February 2016. Only observational studies of people on work absence (≥2 weeks) due to neck/shoulder or back pain were included. The methodological quality of the included studies was assessed using guidelines for assessing quality in prognostic studies on the basis of Framework of Potential Biases. Factors found in the included studies were grouped into categories based on similarities and then labelled according to the aspects covered by the factors in the category.

    RESULTS:

    Nine longitudinal prospective cohort studies and one retrospective study fulfilled the inclusion criteria. From these, five categories of factors were extracted. Our findings indicate that recovery beliefs, health-related factors and work capacity are important for RTW among people with long-term neck or back pain. We did not find support for workplace factors and behaviour being predictive of RTW.

    CONCLUSIONS:

    Our findings suggest that recovery beliefs, perceived health and work capacity may be important targets of intervention for people with long-term neck or back pain. However, more high-quality prospective studies are needed to confirm the results and improve our understanding of what is needed to facilitate RTW in this population.

  • 588.
    Rasmussen, Charlotte
    et al.
    National research centre for the working Environment, Copenhagen, Denmark.
    Hallman, David
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Hellström, Fredrik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Symposia: Musculoskeletal pain as an outcome - how can we get better insight into the time course of musculoskeletal pain?2018Conference paper (Refereed)
  • 589.
    Rezagholi, Mahmoud
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research. Uppsala universitet, Institutionen för medicinska vetenskaper.
    Cost-Efficient Designs for Assessing Work-Related Biomechanical Exposures2012Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Work-related disorders due to biomechanical exposures have been subject to extensive research. Studies addressing these exposures have, however, paid limited attention to an efficient use of resources in exposure assessment. The present thesis investigates cost-efficient procedures for assessment of work-related biomechanical exposures, i.e. procedures aiming at a proper balance between statistical and economic performance.

    Paper I is a systematic review of tools used in literature providing cost-efficient data collection designs. Two main approaches were identified in nine publications, i.e. comparing cost efficiency among alternative data collection designs, and optimizing resource allocation between different stages of data collection, e.g. subjects and samples within subjects. The studies presented, in general, simplified analyses, in particular with respect to economics.

    Paper II compared the cost-efficiency of four video-based techniques for assessing upper arm postures. The comparison was based both on a comprehensive model of cost and error and additionally on two simplified models. Labour costs were a dominant factor in the cost efficiency comparison. Measurement bias and costs other than labour cost influenced the rank and economic evaluation of the assessment techniques.

    Paper III compared the cost efficiency of different combinations of direct and indirect methods for exposure assessments. Although a combination of methods could significantly reduce the total cost of obtaining a desired level of precision, the total cost was, in the investigated scenario, lowest when only direct measurements were performed. However, when the total number of measurements was fixed, a combination was the most cost efficient choice.

    In Paper IV, demand functions were derived for a four-stage measurement strategy with the focus of either minimizing the cost for a required precision, or maximizing the precision for a predetermined budget. The paper presents algorithms for identifying optimal values of measurement inputs at all four stages, adjusted to integers, as necessary for practical application.

    In summary, the thesis shows that it is important to address all sources of costs and errors associated with alternative measurement designs in any particular study, and that an optimal determination of samples at different stages can be identified in several cases not previously addressed in the literature.         

  • 590.
    Rezagholi, Mahmoud
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Differential Socio-Economic Effects of Work Environmental Risk Faktors2016In: Journal of Health & Medical Economics, Vol. 2, no 2, article id 9Article in journal (Refereed)
    Abstract [en]

    Efficient resource allocation in the management of occupational health and safety (OHS) in the workplace requires access to information about the effects of different psychosocial and physical risk factors in the workplace on lost working hours and reduced productivity. The present article aims to help the OHS policy-makers in their decisions on allocating economic and human resources to deal with different environmental risk factors and their socio-economic consequences in the workplace. The socio-economic consequences refer substantially to missed and unproductive working hours due to sickness absences and sickness presenteeism respectively. The methodologies employed to fulfil the purpose of this study included methods to estimate marginal effects of different risk factors on lost working hours and labour productivity. The empirical results of the study showed that the psychosocial and physical dimensions of the work environment of the Swedish company Sandvik Materials Technology had different socio-economic impacts in terms of lost working hours and labour productivity. The psychosocial work environment had the greatest impacts, particularly on reducing work ability and work interest among workers and on work-related disorders among female workers. 

  • 591.
    Rezagholi, Mahmoud
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Economic Decisions on Proposed Work Environmental Studies: a Theory for Cost and Value of Information2016In: Science Journal of Public Health, ISSN 2328-7950, Vol. 4, no 1, p. 11-19Article in journal (Refereed)
    Abstract [en]

    Assessment studies of occupational exposures are retrospectively evaluated based on their achieved statistical efficiency and/or their imposed costs. However, any decision on the performance of such studies strongly requires an economic evaluation in advance. The economic evaluation of proposed work environmental studies needs, in turn, access to information on the socio-economic impacts of occupational exposures. The present article aims to help policy makers in their decisions on proposed work environmental studies by introducing a cost-value approach to the information to be produced during the studies. The cost-value approach is not exposed to subjective judgements, as in the approach of “willingness to pay”, nor to consideration of invaluable statistical efficiency as “output”, as in exposure assessment studies. The work environmental study investigated in this article contained three different groups of occupational exposures that caused sickness absences and impairments at work in a Swedish company, Sandvik Materials Technology. The results show that the suggested study would be acceptable to the policy makers in the company, as its estimated value was strictly greater than its estimated costs.

  • 592.
    Rezagholi, Mahmoud
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Bantekas, Apostolos
    University of Gävle, Faculty of Education and Business Studies, Department of Business and Economic Studies, Economics.
    Making Economic Social Decisions for Improving Occupational Health: A Predictive Cost-Benefit Analysis2015In: Occupational Medicine & Health Affairs, ISSN 1463-502X, E-ISSN 2329-6879, Vol. 3, no 6, article id 225Article in journal (Refereed)
    Abstract [en]

    The few studies attempting to estimate costs of work-related disorders suffer from poor applied methodologies. Further, as the costs are often limited to the company, decisions about investment in improving the work environment are made at the company level. However, economic decisions on changing work environments and improving occupational health need to be made at the societal level. In an economic social decision, all direct and indirect costs imposed on society by work-related disorders are considered, regardless of who pays which cost. This study introduces and demonstrates a methodology appropriate for economic decisions at the societal level for preventing work-related disorders and promoting occupational health in the workplace. The methodology uses the concept of human capital in assessing productivity loss associated with the disorders. The empirical results show that Swedish society could have gained up to 442 855 537 SEK by preventing work-related disorders at the Swedish company Sandvik Materials Technology during 2014, 87% of which would have been captured by the company.

  • 593.
    Rezagholi, Mahmoud
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Cost-Efficient Design of Occupational Exposure Assessment Strategies: A Review2010In: Annals of Occupational Hygiene, ISSN 0003-4878, E-ISSN 1475-3162, Vol. 54, no 8, p. 858-868Article in journal (Refereed)
    Abstract [en]

    When designing a strategy for collecting occupational exposure data, both economic and statistical performance criteria should be considered. However, very few studies have addressed the trade-off between the cost of obtaining data and the precision/accuracy of the exposure estimate as a research issue. To highlight the need of providing cost-efficient designs for assessing exposure variables in occupational research, the present review explains and critically evaluates the concepts and analytical tools used in available cost efficiency studies. Nine studies were identified through a systematic search using two algorithms in the databases PubMed and ScienceDirect. Two main approaches could be identified in these studies: comparisons of the cost efficiency associated with different measurement designs, and optimizations of resource allocation on the basis of functions describing cost and statistical efficiency. In either case, the reviewed studies use simplified analytical tools and insufficient economic analyses. More research is needed to understand whether these drawbacks jeopardize the guidance on cost-efficient exposure assessment provided by the studies, as well as to support theoretical results by empirical data from occupational life.

  • 594.
    Rezagholi, Mahmoud
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Mathiassen, Svend Erik
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Liv, Per
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, CBF. University of Gävle, Centre for Musculoskeletal Research.
    Cost efficiency comparison of four video-based techniques for assessing upper arm postures2012In: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847, Vol. 55, no 3, p. 350-360Article in journal (Refereed)
    Abstract [en]

    Many video-based techniques for assessing postures at work have been developed. Choosing the most appropriate technique should be based on an evaluation of different alternatives in terms of their ability to produce posture information at low input costs, i.e. their cost efficiency. This study compared four video-based techniques for assessing upper arm postures, using cost and error data from an investigation on hairdressers. Labour costs associated with the posture assessments from the video recordings were the dominant factor in the cost efficiency comparison. Thus, a work sampling technique associated with relatively large errors appeared, in general, to be the most cost-efficient because it was labour-saving. Measurement bias and other costs than labour cost for posture assessment influenced the ranking and economic evaluation of techniques, as did the applied measurement strategy, i.e. the number of video recordings and the number of repeated assessments of them.

  • 595.
    Richter, Hans
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Neck pain brought into focus2014In: Work: A journal of Prevention, Assesment and rehabilitation, ISSN 1051-9815, E-ISSN 1875-9270, Vol. 47, no 3, p. 413-418Article in journal (Refereed)
    Abstract [en]

    A time honored dictum states that the eyes "lead the body", i.e. that the body typically adjust its position to compensate for an impoverished retinal image (e. g., as due to optical blur, and/or inappropriately sized visual target). But only moderate or low level of evidence exists in support of this view. Inconclusive evidence does not, however, equal negative evidence. The accommodation/vergence system does exhibit signs of overload in contemporary working life, including eye discomfort, transient myopia, altered pattern of eye-lens oscillations, and associated phoria. Accommodation/vergence overload, caused by non-ergonomic near work, may also emerge as quickly as within one regular workday. Long-term musculoskeletal consequences of high accommodation/vergence demands have nevertheless not yet been studied in any detail. A research agenda which aims to provide multi-scientific evidence for eye-neck/shoulder interactions with public health implications and which also, in addition, study the eye-neck/shoulder mechanisms and elucidates the operating characteristics, should consequently be highly warranted. This new knowledge would be useful for physiotherapists, ergonomists and opticians, who in their profession treat patients experiencing vision-and musculoskeletal disorders. If both visual and the musculoskeletal aspects are given full and equal weight in the design and evaluation of work places, it is predicted to lead to an improved quality of life for the individual worker, and an enhanced productivity for the employer.

  • 596.
    Richter, Hans
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research. Högskolan i Gävle.
    Brautaset, Rune
    Karolinska Institutet, Institutionen för Klinisk neurovetenskap.
    Hägnefelt, Fredrik
    Inför en obligatorisk synundersökning för samtliga elever i årskurs 2. Många människor lider av läs- och skrivsvårigheter i onödan2019In: Sydsvenskan, ISSN 1652-814X, no 02-dec, p. 1Article in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Genom att synens betydelse försummas är risken stor att barn inte får rätt hjälp, skriver optikern Fredrik Hägnefelt och forskarna Hans Richter och Rune Brautaset.

  • 597.
    Richter, Hans
    et al.
    University of Gävle, Centre for Musculoskeletal Research.
    Bänziger, Tanja
    University of Gävle, Centre for Musculoskeletal Research.
    Saber, A
    Forsman, Mikael
    Low-level experimental accommodative/vergence load and trapezius muscle activity2009In: Proceedings of 17th World Congress of Ergonomics, 2009Conference paper (Refereed)
  • 598.
    Richter, Hans
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Crenshaw, Albert G.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Domkin, Dmitry
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Elcadi, Guilherme H.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Near infrared spectroscopy as a useful research tool to measure prefrontal cortex activity during visually demanding near work2016In: IIE Transactions on Occupational Ergonomics and Human Factors, ISSN 2157-7323, Vol. 4, no 2-3, p. 164-174Article in journal (Refereed)
    Abstract [en]

    Background: Unlike the usual skeletal muscles, ciliary muscles responsible for focusing the crystalline eye lens and extraocular muscles responsible for convergence eye movements appear resistant to fatigue. Purpose: The dual goals of this article are to briefly outline the current evidence that suggests that probing into blood flow and hemodynamic prefrontal brain activity with Near-Infrared Spectroscopy (fNIRS) could advance progress in visual ergonomic research, and to provide pilot data exemplifying the proposed approach. Methods: The vision task consisted of sustained focusing on a contrast-varying black and white Gabor grating. Four participants with a median age of 46 (IQR 44 – 50) fixated the grating from a distance of 65 cm. Three counterbalanced 10-min tasks required central fixation and accommodation/convergence on the grating target through: (i) 0.0 diopter (D) lenses, (ii) −1.5 D lenses, and (iii) −3.5yD lenses while maintaining maximal focus. Non-invasive measurements of local oxyhemoglobin (HbO2) were quantified with a one-channel Near Infrared Spectrometer, NIRS. The NIRS probe was placed on the prefrontal cortex in the vicinity of the right dorsolateral prefrontal cortex or Brodmann area 46 (DLPFC, BA 46). Accommodation response and contrast threshold was measured in parallel. Results: General estimating equation analyses showed that baseline subtracted DLPFC blood flow (ΔHbO2) increased significantly over time in all three lens conditions. The effect of time may be caused by a continuous increase in mental effort to compensate for progressively more mental fatigue induced by increased visual attention. The increase of DLPFC ΔHbO2 was also larger in magnitude in participants with larger amplitudes accommodation response (i.e., in participants who minimized deterioration in visual performance). Conclusion: The results from this study indicate that oxyhemoglobin changes recorded over DLPFC with NIRS can be used to assay the degree to which the visual system is strained during demanding near work.

  • 599.
    Richter, Hans
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Domkin, Dmitry
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences, Occupational health science. University of Gävle, Centre for Musculoskeletal Research.
    Elcadi, Guilherme H.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Sports science.
    Anderson, H. W.
    Skogforsk, the forestry research institute of Sweden, Uppsala, Sweden.
    Högberg, Hans
    University of Gävle, Faculty of Health and Occupational Studies, Department of Health and Caring Sciences, Caring science.
    Englund, Martin
    Skogforsk, the forestry research institute of Sweden, Uppsala, Sweden.
    A comparison of mental and visual loads resulting from semi-automated and conventional forest harvesting: An experimental machine simulation study2018Conference paper (Other academic)
    Abstract [en]

    This study is concerned with a new method for partly automating forestry harvesting work. Work-related injuries and constant demands for a higher productivity are two of the many arguments for why forestry work must be improved. Forestry work places great mental demands on the driver because they must continuously evaluate and act on relevant parts in a heavy visual information flow. Against this background the purpose of the present study was to extend the knowledge of functional linkages between visual and mental fatigue, performance, and prefrontal cortex activity, during semi-automated and conventional forestry harvesting work. Eleven healthy participants, range 21–51 years old, with a minimum of 1-year work experience, carried out the task of loading logs along a standardized path in a machine simulator during two counterbalanced 45-min periods: (i) conventional forest harvesting, and; (ii) semi-automated forest harvesting. Equal emphasizes was put on accuracy and speed. During manual forest harvesting the driver controlled the crane arm, used to load logs into the load space of the forest vehicle (“forwarder”), by manually operating the joysticks and so guide the crane to the location of the log and then back to the load space. During semi-automatic forest harvesting the driver moved the crane with the press of a button to a pre-programmed location near the log and then, after another button press, to a pre-programmed location within the load space. The following joystick usage parameters were considered for the statistical analysis: Sequential work cycle number, work phase (1-loading in basket, 2-movement to log, 3-picking up log, 4-movement to load space), number of simultaneously used controls across samples of one phase, number of direction changes of joystick movements per phase. Mental load was assessed by quantification of oxygenated hemoglobin (HbO2) concentration changes over the right dorsolateral prefrontal cortex (dlPFC) via non-invasive functional near infrared spectrometry (fFNIRS: PortaLite mini, Artinis Medical Systems, Zetten, the Netherlands). The frequency and duration of horizontal amplitudes of eye/head/neck angles was assessed continuously with 8 SmartEye cameras and used as a measure of visual load. NASA-TLX and Borg CRS was used to assess perceived mental and physical fatigue. Linear Mixed Model will be used to test and to analyze the effect of the duration of work, joystick usage, work type (manual or semi-automated) and perceived mental and physical effort on the outcome of oxygenated hemoglobin concentration. This study contributes with new knowledge of the consequences of the current increase in automation. The 4th industrial revolution can have tremendous implications on how we perceive and organize work in the future, but little is still known about the impact on human body and brain.

  • 600.
    Richter, Hans
    et al.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research. Högskolan i Gävle.
    Domkin, Dmitry
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.
    Elcadi, Guilherme H.
    University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.
    Andersson, H. W.
    Skogforsk, the forestry research institute of Sweden, Uppsala, Sweden.
    Högberg, Hans
    University of Gävle, Faculty of Health and Occupational Studies, Department of Caring Science, Caring Science.
    Englund, Martin
    Skogforsk, the forestry research institute of Sweden, Uppsala, Sweden.
    A Comparison of Mental and Visual Load Resulting from Semi-automated and Conventional Forest Forwarding: An Experimental Machine Simulation Study2019In: Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018): Volume X: Auditory and Vocal Ergonomics, Visual Ergonomics, Psychophysiology in Ergonomics, Ergonomics in Advanced Imaging / [ed] Bagnara S., Tartaglia R., Albolino S., Alexander T., Fujita Y., Cham, 2019, 827, Vol. X, p. 199-208Conference paper (Refereed)
    Abstract [en]

    The purpose of the present study was to extend the knowledge offunctional linkages between visual and mental load, performance, and prefrontalcortex (PFC) activity, during forestry forwarding work. Eleven healthy participants,range 21–51 years old, with a minimum of 1-year work experience,carried out the task of loading logs along a standardized path in a machinesimulator during two counterbalanced test conditions: (i) conventional cranecontrol, and; (ii) semi-automated crane control. Mental load was assessed byquantification of oxygenated hemoglobin (HbO2) concentration changes overthe right dorsolateral prefrontal cortex (dlPFC) via non-invasive functional nearinfrared spectrometry (fNIRS). Visual, autonomic, and motoric control variableswere measured and analyzed in parallel along with the individual level of performance.Linear Mixed Models (LMM) analysis indicated more mental loadduring conventional crane work. Collectively, our data suggest that fNIRS is aviable tool which can be used in neuroergonomic research to evaluate physiologicalactivity levels in PFC.

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