At the end of anemia correction, the mean eGFRcre was 34.3 ± 10.3 mL/min/1.73 m2 in the high Hb group and 31.5 ± 9.4 mL/min/1.73 m2 in the low Hb group, and the mean eGFRave was 38.1 ± 11.5 mL/min/1.73 m2 and 33.8 ± 10.5 mL/min/1.73 m2, respectively (Figure 5). This evidence concerns the gene GSTM1 and anemia.