Figure 2

Multivariable-adjusted Odds ratios (95% CIs) for NAFLD based on serum direct bilirubin levels quartiles, stratified by sex and BMI respectively.
The ORs (95% CIs) were presented compared with the quartile 1 of serum bilirubin level (reference), after adjustment for underlying confounders including age, education level, current smoking status, current alcohol drinking status, physical activity, coronary heart disease, diabetes, hypertension disease, tumor history, lipid lowering agent, waist circumference, body mass index, glucose, high-density lipoprotein, total cholesterol, triglyceride and uric acid.