HNF1A and type 1 diabetes mellitus: Additionally, T1DM patients had higher eGFR-cr than eGFR-cys (11.6 mL/min/1.73 m2; p = 0.0004); no difference occurred in T2DM (p = 0.91). Conclusions. We confirmed that eGFR-cys values in HNF1A-MODY patients are higher compared to eGFR-cr.