Fig. 2

Receiver operating characteristic (ROC) curve analysis of each index. Area under the ROC curve (AUC) and 95 % CIs of each index was shown in tables below. VAI visceral adiposity index, BMI body mass index, WC waist circumference, TyG triglyceride glucose index, TyG-BMI combined TyG and BMI, TyG-WC combined TyG and WC. Grade: 0.90–1 = excellent (A), 0.80–0.90 = good (B), 0.70–0.80 = fair (C), 0.60–0.70 = poor (D) and 0.50–0.60 = fail (F)