FGF21 and type 2 diabetes mellitus: Subjects with T2D and eGFR < 60 mL/min × 1.73 m2, when compared to those with eGFR ≥ 60 mL/min × 1.73 m2, demonstrated increased urinary excretion of FGF21 (p = 0.04) and CTGF (p = 0.04).