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Cross-sectional study of the relationship between repetitive work and the prevalence of upper limb musculoskeletal disorders.

Authors
Latko-WA; Armstrong-TJ; Franzblau-A; Ulin-SS; Werner-RA; Albers-JW
Source
Am J Ind Med 1999 Aug; 36(2):248-259
NIOSHTIC No.
20031287
Abstract
BACKGROUND: This study examined the relationship of repetitive work and other physical stressors to prevalence of upper limb discomfort, tendinitis, and carpal tunnel syndrome. METHODS: Three hundred fifty-two workers from three companies participated. Job exposure levels for repetition and other physical stressors were quantified using an observational rating technique. Ergonomic exposures were rated on a 10-point scale, where 0 corresponded to no stress and 10 corresponded to maximum stress. Job selection was based on repetition (three categories: high, medium, and low) to ensure a wide range of exposures. Physical evaluations on all participating workers were performed by medical professionals and included a self-administered questionnaire, physical exam, and limited electrodiagnostic testing. RESULTS: Repetitiveness of work was found to be significantly associated with prevalence of reported discomfort in the wrist, hand, or fingers (odds ratio (OR) = 1.17 per unit of repetition; OR = 2.45 for high vs. low repetition), tendinitis in the distal upper extremity (OR = 1.23 per unit of repetition; OR = 3.23 for high vs. low repetition), and symptoms consistent with carpal tunnel syndrome (OR = 1.16 per unit of repetition; OR = 2.32 for high vs. low repetition). An association was also found between repetitiveness of work and carpal tunnel syndrome, indicated by the combination of positive electrodiagnostic results and symptoms consistent with carpal tunnel syndrome (OR = 1. 22 per unit of repetition; OR = 3.11 for high vs. low repetition). CONCLUSIONS: These findings indicate that repetitive work is related to upper limb discomfort, tendinitis, and carpal tunnel syndrome in workers. Further research with a wider range of exposures is needed to evaluate the effects of other physical stresses alone and in combination.
Keywords
Repetitive-work; Traumatic-injuries; Ergonomics; Carpal-tunnel-syndrome; Physical-stress
Contact
Alfred Franzblau, University of Michigan, School of Public Health, 1420 Washington Heights, Ann Arbor, MI 48109-2029
CODEN
AJIMD8
Publication Date
19990801
Document Type
Journal Article
Funding Amount
610264
Funding Type
Grant
Fiscal Year
1999
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-002941
Issue of Publication
2
ISSN
0271-3586
Priority Area
Grants Other
Source Name
American Journal of Industrial Medicine
State
MI
Performing Organization
University of Michigan, School of Public Health, Ann Arbor, MI
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