GSTM1 and anemia (phenotype): Urinary L-FABP levels correlated with ACR (r = 0.410, P < 0.001), eGFR (r = -0.364, P < 0.001), BMI (r = -0.277, P = 0.001), Hb levels (r = -0.293, P < 0.001), and the presence of anemia (r = 0.250, P = 0.002) (Table 2).