Fig 3. Joint analysis of total sleep duration and daytime napping duration in relation to the risk for microalbuminuria.

The multivariate ORs for microalbuminuria were adjusted for age, sex, BMI, HC, WC, alcohol consumption and smoking habits, physical exercise, TG, TC, HDL, LDL, GGT, blood glucose and blood pressure. The asterisk denotes that the result was significantly different from 7–8 hours of sleep duration per day without daytime napping.