Lipid-related Insulin Resistance Indices for the Diagnosis of Non-alcoholic Fatty Liver Disease in Chinese Adults.

OBJECTIVE

To analyze the diagnostic efficacy of lipid-related insulin resistance (IR) markers in patients with non-alcoholic fatty liver disease (NAFLD) and metabolic abnormalities (MA).

METHOD: Patients with NAFLD with MA, non-NAFLD patients with MA, and patients with NAFLD without MA underwent liver biopsy. Homeostasis model assessment of insulin resistance (HOMA-IR), triglyceride/high-density lipoprotein cholesterol (TG/HDL-C), visceral obesity index (VAI), lipid accumulation product (LAP), and triglyceride glucose (TyG) index were analyzed. The diagnostic efficacy of these indicators of NAFLD was also evaluated.

RESULTS

In the NAFLD-MA group, BMI, HOMA-IR, LAP, VAI, TyG index, and TG/HDL-C ratio were higher than those in the non-NAFLD-MA group ( P < 0.001). Logistic regression indicated that BMI and TyG index were independent risk factors for NAFLD. Receiver Operating Characteristic (ROC) curves analysis revealed that the Area Under the ROC Curve (AUC) for TyG-BMI was 0.819, and the optimal cutoff for NAFLD was TyG-BMI 39.77. For patients with NAFLD with or without MA, logistic regression analysis suggested that age, TG level, and TyG index were independent risk factors. The area under the ROC curve showed that AUC for the TyG index was 0.724. The optimal cutoff for NAFLD-non MA was a TyG index of 1.580.

CONCLUSION

TyG index has diagnostic value in both types of NAFLD; however, TyG-BMI is better in patients with NAFLD with MA and may be an effective screening indicator alone in patients with NAFLD without MA.