GSTM1 and anemia: More than one‐third (39.0%; n = 358) of children aged 6–23 months were anaemic (Hb < 110 g/l); 55.3% (n = 198) of the anaemic children had mild anaemia (Hb 100–109 g/l), 41.6% (n = 149) had moderate anaemia (Hb 70–99 g/l), and 3.1% (n = 11) had severe anaemia (Hb < 70 g/l).