GSTM1 and anemia (phenotype): The proportions of children with moderately severe anaemia (Hb<8 g/dL) were similar in the two groups, 2.9% in children who had previously received IPTc and 2.7% in children who had previously received placebos (PR = 1.05; 95%CI 0.67–1.65) (P = 0.84).