GSTM1 and anemia (phenotype): The FIND-CKD trial randomised adult patients with non-dialysis-dependent CKD, anaemia and iron deficiency to receive high-ferritin IV iron (n = 155), low-ferritin IV iron (n = 154) or oral iron (n = 317). Patients treated with higher ferritin quickly reached and maintained the Hb target (increase ≥1 g/dl) and were less likely to require ESA treatment compared with the other treatment arms. No significant differences in QoL outcomes were observed between the treatment arms.