Association between long working hours and serum gamma-glutamyltransferase levels in female workers: data from the fifth Korean National Health and Nutrition Examination Survey (2010-2011)

Association between long working hours and serum gamma-glutamyltransferase levels in female workers: data from the fifth Korean National Health and Nutrition Examination Survey (2010-2011)

Objectives: The present study investigated the association between long working hours and serum gammaglutamyltransferase(GGT) levels, a factor influencing the incidence of cardiovascular disease. Methods: Data from the fifth Korean National Health and Nutrition Examination Survey (2010.2011) were used toanalyze 1,809 women. Subjects were divided into three groups based on the number of weekly working hours: ≤29,30.51, and ≥52 hours per week. Complex samples logistic regression was performed after adjusting for general andoccupational factors to determine the association between long working hours and high serum GGT levels. Results: The prevalence of high serum GGT levels in groups with ≤29, 30.51, and ≥52 working hours per week was22.0%, 16.9%, and 26.6%, respectively. Even after adjusting for general and occupational factors, those working 30.51hours per week had the lowest prevalence of high serum GGT levels. Compared to those working 30.51 hours perweek, the odds ratios (OR) of having high serum GGT levels in the groups with ≥52 and ≤29 working hours per weekwere 1.56 (95% confidence interval [CI], 1.10.2.23) and 1.53 (95% CI, 1.05.2.24), respectively. Conclusions: Long working hours were significantly associated with high serum GGT levels in Korean women.

Objectives: The present study investigated the association between long working hours and serum gammaglutamyltransferase(GGT) levels, a factor influencing the incidence of cardiovascular disease. Methods: Data from the fifth Korean National Health and Nutrition Examination Survey (2010.2011) were used toanalyze 1,809 women. Subjects were divided into three groups based on the number of weekly working hours: ≤29,30.51, and ≥52 hours per week. Complex samples logistic regression was performed after adjusting for general andoccupational factors to determine the association between long working hours and high serum GGT levels. Results: The prevalence of high serum GGT levels in groups with ≤29, 30.51, and ≥52 working hours per week was22.0%, 16.9%, and 26.6%, respectively. Even after adjusting for general and occupational factors, those working 30.51hours per week had the lowest prevalence of high serum GGT levels. Compared to those working 30.51 hours perweek, the odds ratios (OR) of having high serum GGT levels in the groups with ≥52 and ≤29 working hours per weekwere 1.56 (95% confidence interval [CI], 1.10.2.23) and 1.53 (95% CI, 1.05.2.24), respectively. Conclusions: Long working hours were significantly associated with high serum GGT levels in Korean women.