PTPN22 and type 1 diabetes mellitus: In race-based subgroup analyses, the PTPN22 rs2476601 gene polymorphism was significantly associated with the risk of T1D in Caucasians (CC vs. TT: OR = 0.254, 95% CI = 0.211–0.305; CT vs. CC: OR = 1.764, 95% CI = 1.553–2.004) and Asian races (CC vs. TT: OR = 0.277, 95% CI = 0.123–0.622; CT vs. CC: OR = 2.921, 95% CI = 2.027–2.207).