Pooled mean (95% CI) HRs for the risk of all-cause mortality in patients with CKD not on dialysis with Hb < 10 g/dL (n = 17) and 10–12 g/dL (n = 1) were 1.70 (1.42–2.01) and 0.97 (0.92–1.01), respectively. Here, GSTM1 is linked to chronic kidney disease.