Table 3 reports the computed empirical indices of glucose/insulin homeostasis by group. Glucose levels at 2 hours (G2h) were higher in T2DM, IFG+IGT and in IGT subjects (11.95±2.43, 9.22±1.43 and 9.17±1.37 respectively, P<0.001 from ANOVA). Average values of G2h in the other two groups were 5.71±2.13 in NGT patients and 5.88±1.08 in the IFG group. This evidence concerns the gene INS and type 2 diabetes mellitus.