ROC curve analysis was performed to explore the predictive value of VAI for identifying FPG ≥ 7.0 mmol/L (Fig. 4) after adjusting for age, gender, SBP, DBP, HR, smoking, physical activity, hypertension, hyperlipidemia, stroke, CKD, race, TC, LDL-c, ALT and ALP. This evidence concerns the gene GPT and chronic kidney disease.