KNG1 and type 2 diabetes mellitus: The four metabolic markers that highly correlated with 1-hour PG (ie, mannose, AHB, [Hyp3]-BK, and X-12063) also predicted progression to type 2 diabetes with similar predictive performance as 1-hour PG (AUC = 0.75, sensitivity = 0.68, specificity = 0.71, q = 0.53).