A total of 574 children were enrolled into this study comprising of 137 with Severe Malaria Anaemia (SMA, Hb < 5.0 g/dL with any parasite density) and 437 non-severe malaria anaemia (Hb ≥ 5.0 g/dL with any density parasitaemia). This evidence concerns the gene GSTM1 and anemia (phenotype).