INS and type 2 diabetes mellitus: The SIMO parameter , which represents maximal insulin secretion rate, also resulted non-significant (P = 0.31) even if subjects seemed to divide into two groups: IGT and IFG+IGT patients with larger  values (71.84±66.52 and 72.01±112.09 respectively), and NGT, IFG and T2DM patients with smaller  values (45.93±41.67, 34.21±31.72 and 43.6±30.93 respectively).