CDKN2A and prediabetes syndrome: The area under ROC curve for the prediction model of prediabetes on the predictors including residence, waist-hip ratio, and systolic blood pressure, dyslipidemia and CDKN2A-rs10811661 polymorphism was 0.646 (95 % CI: 0.614 − 0.677, P < 0.0001).