C/T and T/T genotypes at IFIH1 locus (rs1990760) were more frequent in T1D patients than in HT children (P = 0.001, OR = 4.67, 95%CI = 1.86–12.33, and P = 0.004, OR = 3.78, 95%CI = 1.50–9.99 respectively, the power of the test 0.990, estimated effect size w equal to 0.309, with the total sample size n = 282) (Figure 5). The gene discussed is IFIH1; the disease is type 1 diabetes mellitus.