Objective To analyze the prevalence and its influencing factors of work-related musculoskeletal disorders(WMSDs)of workers in an auto parts manufacturer.
Methods A total of 831 workers in an auto parts manufacturing enterprise were studied. The Nordic musculoskeletal disease questionnaire was used to investigate the prevalence of WMSDs. Logistic regression analysis was used to analyze the influencing factors.
Results The total prevalence of WMSDs in the study subjects was 46.9%. The highest prevalence rate was in neck(30.7%), followed by shoulder(23.2%)and ankle(20.2%). The prevalence of WMSDs in neck, ankle, lower back, hand, leg and elbow of workers in different positions was statistically significant(P < 0.05). The results of multivariate logistic regression analysis showed that workers who worked in uncomfortable postures, kept their heads down for a long time, bended their backs, often repeated the same movements in the waist and back, and maintained the same posture for a long time in the neck, had higher risks of neck WMSDs (OR = 2.12, 2.08, 1.68, 1.61, respectively, P < 0.05). The main risk factors for shoulder WMSDs were working in uncomfortable postures(OR = 2.44, P < 0.05) and frequent overtime work(OR = 1.75, P < 0.05). The main risk factors for ankles were working in uncomfortable postures(OR = 1.91, P < 0.05)and frequent overtime work(OR = 1.63, P < 0.05). Male was the protective factor of WMSDs in neck and shoulder(OR = 0.42, 0.36, P < 0.05).
Conclusions The prevalence of WMSDs in the neck, shoulders and ankles of workers in this enterprise was relatively higher. The risk factors mainly included poor working posture and unreasonable work organization. Effective ergonomic interventions should be carried out to reduce the health influences of WMSDs.
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