Odds ratio (OR) and 95% confidence interval of diabetes* according to overtime work hours.

Abbreviations: OR, odds ratio; Ref, reference.*Defined as fasting glucose ≥126 mg/dL (7.0 mmol/l), HbA1c ≥6.5% (48 mmol/mol), or current use of anti-diabetic drug.†P for quadratic trend obtained from multiple logistic regression analysis by assigning 23, 62, 90, and 100 to categories of overtime work.‡Model 1 adjusted for age (continuous), sex, and company in 4 companies (n = 40,861).§Model 2 adjusted for factors in model 1 and smoking status (never, past, or current) in 4 companies (n = 40,861).||Model 3 adjusted for factors in model 2 and body mass index (kg/m2, continuous) in 4 companies (n = 40,861).¶Model 1 adjusted for age (continuous) and sex in 1 company (n = 33,807).**Model 2 adjusted for factors in model 1 plus smoking status (never, past, or current), body mass index (kg/m2, continuous), alcohol use (non-drinker, drinker consuming >0 to ††Model 3 adjusted for factors in model 2 and sleep duration (‡‡Model 4 adjusted for factors in model 3 and leisure time physical activity (