HLA-DRB1 and type 1 diabetes mellitus: In contrast, HLA-DRB1*07:01-HLA-DQA1*03:01-HLA-DQB1*02:02, confers susceptibility to Type 1 diabetes (frequency 3.1% in cases, 0.8% in controls; odds ratio 5.28, 95% CI 1.77–15.81; Table 4).