Additionally, the specific differences in basic clinical results, especially indicators for lipid metabolism, between GCK‐MODY, HNF1A‐MODY, and type 2 diabetes, as well as the difference between the proband group and the all‐family‐members group in MODY patients, have yet to be comprehensively characterized. The gene discussed is HNF1A; the disease is type 2 diabetes mellitus.