GSTM1 and anemia: At the age of 1 month anaemia was 34.3% (Hb 10.5 ± 3.4 g/dl) in the short arm group and 60.5% (Hb 10.4 ± 2.9 g/dl) in the long arm however this difference was not significant (t-test, p = 0.612).