Association Between Long Working Hours and Chronic Kidney Disease According to Diabetic Status: A Nationwide Study (Korean National Health and Nutrition Examination Survey 2010–2017)

This study aimed to investigate the relationship between long working hours and chronic kidney disease (CKD) according to diabetic status. METHODS: Twelve thousand seven hundred three full-time employees without diabetes and 2136 with diabetes were included in this study. Participants were grouped according to working hours: ≤40, 41 to 52, and >52 h/week. Multiple logistic regression was used to evaluate the association between working hours and CKD prevalence. RESULTS: Participants with diabetes who worked 41 to 52 h/week showed 1.85 times higher odds of CKD (95% CI 1.15–2.96; P = 0.0112) compared with those who worked ≤40 h/week after adjusting for covariates. An interaction between diabetes and long working hours was observed (P for interaction = 0.0212) in the model. CONCLUSION: Long working hours are associated with CKD in participants with diabetes. An interaction between long working hours and diabetes leading to CKD development may exist.