Odds ratio with 95% confidence interval of diabetes according to overtime work hours stratified by participant characteristics.

Abbreviations: BMI, body mass index; Ref, reference.
*P for trend obtained from multiple logistic regression analysis by assigning 23, 62, 90, and 100 to categories of overtime work.
†Adjusted for age (continuous), sex, company, smoking status (never, past, or current), and BMI (kg/m2, continuous) in 4 companies (n = 41,081).
‡48 women in 1 company were excluded in this analysis due to no diabetic patients.
§Adjusted for age (continuous), sex, company, smoking status (never, past, or current), BMI (kg/m2, continuous), alcohol use (non-drinker, drinker consuming >0 to <23 g, 23 to <46 g, or ≥46 g of ethanol per day), sleep duration (<6 hours, 6 to <7 hours, or ≥7 hours per day), physical activity (<150 min or ≥150 min per week), family history of diabetes (yes or no), shift work (yes or no), department (field work or non-field work), and job position (high or low) in 1 company (n = 33,807).