The Hb, Cr, BUN, and eGFR of the DN group were 108.65 g/L, 186.3 μml/L, 9.7 mmol/L, and 54.65 mL/min/1.73 m2, respectively; while those in the DM group were 119.8 g/L, 80.04 μml/L, 3.2 mmol/L, and 92.03 mL/min/1.73 m2, respectively. Here, GSTM1 is linked to diabetes mellitus.