In the Polish cohort, we identified 3 HNF1A-MODY patients with chronic kidney disease (CKD) defined as CKD-EPI estimated GFR (eGFR) <60 ml/min/1.73 m2 [15]; there were 5 such individuals in the T1DM group, 6 in the T2DM group and none in the ND group. Here, HNF1A is linked to type 1 diabetes mellitus.