CSNK1D and type 1 diabetes mellitus: In contrast, CKiD in males (bias = 5.23 mL/min/1.73 m<sup>2</sup>; P30 = 81.0%) and CKD-EPI 2009 in the 16-18.5 years subgroup (bias = -0.04 mL/min/1.73 m<sup>2</sup>; P30 = 84.6%) were top performers.<h4>Conclusions</h4>Subgroups of children and adolescents with T1D may benefit from different eGFR equations for accurate subclinical DKD evaluation.