Occupational mechanical exposures and upper-body musculoskeletal disorders: an overview of systematic reviews

The aim was to provide a comprehensive overview of systematic reviews with meta-analyses of the association between occupational mechanical exposures and upper-body musculoskeletal disorders.

A systematic literature search was conducted in PubMed, Web of Science, Embase, and CINAHL. Systematic reviews were considered eligible if they included occupational mechanical exposures and provided weighted measures of association in relation to specific musculoskeletal disorders. From each systematic review, data on eg databases searched, exposure, outcome, effect estimates, and quality of evidence of the association were extracted. The methodological quality of each systematic review was assessed using AMSTAR 2.

The screening of 1,756 articles resulted in the inclusion of 17 systematic reviews with meta-analysis covering 6 musculoskeletal disorders: subacromial pain syndrome (n = 3), lateral epicondylitis (n = 2), carpal tunnel syndrome (n = 7), Dupuytren's disease (n = 4), hand-arm vibration syndrome (n = 1), and hand osteoarthritis (n = 1). The weighted odds ratios from the meta-analyses generally ranged between 1.5 and 3.0. Approximately 35% of the included systematic reviews assessed the quality of evidence of the association, and among these, 48% graded the evidence as being low to very low.

In general, this overview found an increased risk associated with most mechanical exposures in relation to specific upper-body musculoskeletal disorders. However, grading of evidence quality was rarely applied, and when present, showed substantial variability. Future research related to primary studies should prioritise high-quality prospective studies and objective exposure assessments, and systematic reviews would benefit from standardised methodologies and improved reporting transparency to further strengthen the evidence quality.