Characteristics of study population by γ-glutamyltransferase quartiles (U/L).

1. Data were means ± SD or medians (interquartile ranges) for skewed variables or numbers (proportions) for categorical variables.2. P for trend was calculated for the linear regression analysis tests across the groups. P values were for the ANOVA or χ2 analyses across the groups.3. *P4. BMI, body mass index; WC, waist circumference; SBP, systolic blood pressure; DBP, diastolic blood pressure; TG, triglycerides; TC, total cholesterol; HDL-C, high-density lipoprotein cholesterol; LDL-C, low-density lipoprotein cholesterol; FPG, fasting plasma glucose; HOMA-IR, homeostasis model assessment of insulin resistance; eGFR, estimated glomerular filtration rate; GGT, γ-glutamyltransferase.Characteristics of study population by γ-glutamyltransferase quartiles (U/L).