In China, the former was infrequent (0.51 per 100,000)[11] while the latter was prevalent (5.9% for Chinese newly diagnosed type 2 diabetes)[12], and autoantibody (usually GAD antibody) is one of the most important factors to distinguish type 1 diabetes from type 2 diabetes[13]. The gene discussed is GAD1; the disease is type 2 diabetes mellitus.