GSTM1 and anemia (phenotype): In the multivariate analysis, higher Hb levels remained significantly associated with lower rates of severe anemia (HR 0.52 [0.34–0.75], p < 0.001) and any severe hematologic event (HR 0.53 [0.38–0.72], p < 0.001), as did kidney dysfunction (HR 3.81 [1.19–12.57], p = 0.023 and HR 3.02 [1.05–8.59], p = 0.036, respectively).