DFS+ and DFS− patients showed lower levels of total Hb (11.6 ± 4.7, 11.7 ± 2.1 vs. 13.2 ± 2.1 g/dL) and higher levels of creatinine (1.25, 1.23 vs. 0.93 mg/dL, p < 0.001) compared to non-DM ones. Here, GSTM1 is linked to diabetes mellitus.