A higher percentage of HLA-DPA1*01:03-*01:03 (7.2% vs. 3.7%, P value = 0.006) and *01:03-*02:01 (4.9% vs. 2.3%, P value = 0.009) genotypes were identified among the subjects with GD that had diabetes than those with GD that did not have diabetes (Table 4). This evidence concerns the gene HLA-DPA1 and diabetes mellitus.