HLA-DQB1 and type 1 diabetes mellitus: The analysis of HLA-DQB1 genes with respect to GADA positivity in people with T1D (Table 3) revealed a significantly increased frequency of HLA-DQB1∗02 allele in GADA+ patients as compared to that in GADA– (94.53% vs. 73.39%, Pc = 2.19 × 10−5, OR = 6.27; 95% CI: 2.7-14.49).