DPP4 and type 2 diabetes mellitus: There was no difference in DPP4 levels between males and females within non-obese (44.7 ± 28.9 vs. 52 ± 33, p = 0.405) and obese (66.8 ± 29.8 vs. 60.9 ± 25.4, p = 0.511) T2DM groups.