%0 Journal Article %T Socioeconomic position and low-back pain – the role of biomechanical strains and psychosocial work factors in the GAZEL cohort %A Plouvier, Sandrine %A Leclerc, Annette %A Chastang, Jean-François %A Bonenfant, Sébastien %A Goldberg, Marcel %J Scandinavian Journal of Work, Environment & Health %D 2009 %8 December 35 %N 6 %@ 0355-3140 %F Plouvier2009 %X '

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OBJECTIVE ': 'To analyze the role that biomechanical strains and psychosocial work factors play in occupational class disparities in low-back pain in the GAZEL cohort.

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METHODS ': 'Recruited in 1989, the GAZEL cohort members were employees of the French national company in charge of energy who volunteered to enroll in an annual follow-up survey. The study population comprised 1487 men who completed questionnaires in 1996 (past occupational exposure to manual material handling, bending/twisting, and driving), 1997 (psychosocial work factors), and 2001 (low-back pain using a French version of the Nordic questionnaire for the assessment of low-back pain). Associations between low-back pain for >30 days in the preceding 12 months and social position at baseline (four categories) were described with a Cox model to determine prevalence ratios for each category. We compared adjusted and unadjusted ratios to quantify the contribution of occupational exposures.

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RESULTS ': 'The prevalence of low-back pain for >30 days was 13.6%. The prevalence of low-back pain adjusted for age was significantly higher for blue-collar workers and clerks than for managers. The number of socioeconomic disparities observed was significantly reduced when biomechanical strains were taken into account; adjusting for psychosocial factors had little impact.

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CONCLUSION ': 'In this population, occupational exposures – especially biomechanical strains – played an important role in occupational class disparities for persistent or recurrent low-back pain.

%K biomechanical strain %K GAZEL cohort %K health inequality %K low-back pain %K MSD %K musculoskeletal disorder %K occupational exposure %K psychosocial factor %K psychosocial work factor %K social inequality %K socioeconomic position %K socioeconomic status %K work factor %R 10.5271/sjweh.1353 %U https://www.sjweh.fi/show_abstract.php?abstract_id=1353 %U https://doi.org/10.5271/sjweh.1353 %P 429-436