Significant associations were observed between T1D patients and controls in alleles of IL2RA (rs7093069 T > C, P = 0.013, OR = 1.59, 95%CI = 1.10–2.34, the power of the test was 0.999, estimated effect size w was equal to 0.231, with the total sample size n = 598) (Figure 2) and CTLA-4 (rs231775 G > A, P = 0.016, OR = 1.50, 95%CI = 1.07–2.10, the power of the test was 0.9935, estimated effect size w was equal to 0.203, with the total sample size n = 608) (Figure 6). This evidence concerns the gene CTLA4 and type 1 diabetes mellitus.