GSTM1 and anemia: 13 children were admitted with severe malaria (11 in the CD group, and 2 in the AL group); 23 children had severe anaemia (Hb<5), 17 (2.9%) in the CD group and 6 (1.0%) in the AL group (risk difference 1.8%, 95%CI 0.3% to 3.4%) and 8 children were hospitalized with other conditions, not thought to be related to treatment (5 in the CD group and 3 in the AL group).