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Is objectively measured sitting at work associated with low back pain? A cross sectional study in the DPhacto cohort
National Research Centre for the Working Environment, Copenhagen.
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.ORCID iD: 0000-0002-2741-1868
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.ORCID iD: 0000-0003-1443-6211
Department of Public Health, Faculty of Health Sciences, University of Copenhagen.
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2017 (English)In: Scandinavian Journal of Work, Environment and Health, ISSN 0355-3140, E-ISSN 1795-990XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

Objectives. Low back pain (LBP) is a substantial health challenge, due to the risk for long term sickness absence and early retirement. Several biomechanical exposures at work, including sitting, have been suggested to increase the risk for LBP. The objective of this study was to determine the extent to which temporal patterns and total amount of objectively measured sitting is associated with LBP intensity, and whether selected modifiers influence these associations.

Methods. This cross sectional study uses baseline data from the Danish PHysical ACTivity cohort with objective measurements of physical activities in the cleaning, transport and manufacturing sectors. Peak intensity of LBP was collected by questionnaire on a 0-10 scale and sitting was expressed in terms of total duration and temporal pattern, i.e. time spent in brief bursts (≤5 minutes), moderate periods (>5 – ≤20 minutes) and prolonged periods of sitting (>20 minutes); both during work and whole day (waking hours only). Associations were determined using linear regression in models accounting for moderation and confounding. Factors evaluated as moderators or confounders were assessed by questionnaire.

Results. The population consisted of 704 participants. No significant associations were found between total duration or temporal patterns of sitting and LBP intensity, neither during work nor for the whole day. Body Mass Index significantly moderated the association between sitting and LBP; participants with a high and low BMI showing a negative and positive association, respectively.

Conclusion. Sitting wasn´t independently associated with peak LBP intensity, suggesting other exposures to be more powerful risk factors for LBP.

Place, publisher, year, edition, pages
2017.
Keyword [en]
Sedentary; accelerometer; occupational health; occupational sitting; physical activity; inactivity; temporal patterns; time pattern; musculoskeletal disorders; musculoskeletal pain
National Category
Environmental Health and Occupational Health
Identifiers
URN: urn:nbn:se:hig:diva-24188DOI: 10.5271/sjweh.3680OAI: oai:DiVA.org:hig-24188DiVA: diva2:1109002
Available from: 2017-06-13 Created: 2017-06-13 Last updated: 2017-10-27

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