RESUMO
OBJECTIVE: To investigate the current status of long working hours among employees of internet enterprises, and explore its effects on work related musculoskeletal disorders(WMSDs)and job burnout. METHODS: A total of 3 589 employees from 35 internet enterprises in 3 provinces were selected as the research subjects using the method of cluster sampling.The Questionnaire of Musculoskeletal Disorders and Maslach Burnout Inventory-General Survey was used to assess employees′ WMSDs and job burnout, and to explore the influence of long working hours(>40 hours per week) on WMSDs and job burnout. RESULTS: The average weekly working hours of these workers were(48±11) hours, and the workers working for long-hour accounted for 68.0%(2 442/3 589). The prevalence of WMSDs was 80.4%(2 886/3 589), and the detection rate of job burnout was 10.5%(376/3 589). The results of binary logistic regression analysis showed that long working hour was the influencing factor of WMSDs and job burnout after removing confounding factors including gender, age, education level, marital status, income, exercise frequency, diet habit, smoking status, type of work and length of service(P<0.01). The longer the weekly working hour, the higher the risk of WMSDs and job burnout. CONCLUSION: Long working hour increases the risk of WMSDs and job burnout with a dose-response relationship in internet enterprise employees.