The discriminative accuracy, as expressed by AUC of ghrelin between HNF1A–MODY and T1DM, was 0.73 (95 % CI 0.63; 0.84) with the corresponding sensitivity and specificity of 74 % (95 % CI 57.2; 85) and 66.7 % (95 % CI 49.3–98.90), respectively. Here, HNF1A is linked to type 1 diabetes mellitus.