In this study we found that HLA -DQA1*03:01:01G (OR = 2.46, p value = 0.011) and -DQB1*03:02:01G (OR = 2.43, p value = 0.022) are enriched in Qatari children with type 1 diabetes mellitus. This evidence concerns the gene HLA-DQA2 and diabetes mellitus.