GSTM1 and anemia (phenotype): The number of maternal anaemia episodes and LBW were not associated with infant Hb during the first year of life (dm = −0.5 g/L, 95% CI [-1.6, 0.6], P = 0.37; dm = −3.1 g/L, 95% CI [-7.5, 1.2], P = 0.16, respectively).