CYP19A1 and type 2 diabetes mellitus: However, rs1062033 in CYP19A1 was found to be associated with a decreased risk of T2DM under GC genotype of co-dominant (OR = 0.50, 95% CI = 0.33–0.75, P = 0.001) and dominant models (OR = 0.59, 95% CI = 0.40–0.87, P = 0.008).