Quantitative exposure‐response relations between physical workload and prevalence of lateral epicondylitis in a working population

Abstract Background Lateral epicondylitis is a common work‐related musculoskeletal disorder. The objective of this study was to identify risk factors associated with lateral epicondylitis among active workers. Methods Seven‐hundred thirty‐three workers in 12 Washington worksites participated in structured interviews, physical examinations, and individual exposure assessments of biomechanical and psychosocial factors. Multivariable logistic modeling was used. Results Thirty‐eight subjects (5.2%) had lateral epicondylitis. Age (36–50 years‐old), being female, and low social support at work were significant risk factors. Frequency of forceful exertion (≥5 vs. <1 times/min (OR 5.17, 95%CI 1.78–15.02), and ≥1 to <5 vs. <1 (OR 4.47, 95%CI 1.57–13.71)) and forearm supination at ≥45° for ≥5% of the time with high lifting force (OR = 2.98, 95% CI 1.18–7.55) were significant physical load factors. Conclusions Frequency of forceful exertion or a combination of forearm supination and forceful lifting were significant physical factors and should be considered for prevention strategies. Am. J. Ind. Med. 52:479–490, 2009. © 2009 Wiley‐Liss, Inc.