The ROC curve analysis performed for T2DM and HNF1A-MODY revealed an AUC of 0.80 (95% CI 0.60–0.93) with sensitivity 78.6% (95% CI 49.2–95.3) and specificity 75.0% (95% CI 42.8–94.5). The gene discussed is HNF1A; the disease is type 2 diabetes mellitus.