To the best of our knowledge, this meta‐analysis is the first article to compare results from multiple countries for routine examinations that involved indicators for baseline data and glucose and lipid metabolism between GCK‐MODY, HNF1A‐MODY, and type 2 diabetes, as well as the difference between proband and all‐family‐members subgroups. Here, GCK is linked to type 2 diabetes mellitus.