The effect of SQ-LNSs on Hb concentration did not differ by child sex (Figure 6A, Supplemental Figure 8A4) but we observed a greater effect of SQ-LNSs on the prevalence of anemia among female than among male children (PR: 0.82 compared with 0.87) (Figure 6B, Supplemental Figure 8B4). Here, GSTM1 is linked to anemia (phenotype).