Fig 3. Odds radio with 95% CI of alcohol consumption on insomnia in total, different gender and age categories.

For the total subjects, we presented the association without the introduction of the confounding factors, and we also presented the association controlling for age, gender, BMI, income, education level, physical activities, smoking status, hypertension, diabetes mellitus, TC, TG, HDL-C and LDL. In the stratification analysis, all the covariates were controlled.