GSTM1 and neoplasm: At the time of dialysis initiation, age (72.2 ± 5.3 vs. 70.6 ± 4.5 years, p < 0.001), Hb (9.4 ± 1.6 vs. 9.9 ± 1.7 g/dL, p < 0.001), eGFR (8.5 ± 4.4 vs. 9.5 ± 4.3 mL/min/1.73 m2, p = 0.012), planned dialysis (35.4 vs. 97.8%, p < 0.001), employment status (7.0 vs. 13.8%, p = 0.011), marriage status (78.7 vs. 89.1%, p = 0.007), CHF (11.0 vs. 20.6%, p = 0.002), and tumor (9.6 vs. 0.7%, p < 0.001) were significantly different between elderly HD and PD patients.