Hierarchical regression analysis revealed that the following factors were significantly associated with higher and lower Hb concentrations in children after backward stepwise method: (a) maternal education (being some secondary); (b) wealth index of households (middle-class); (c) maternal anaemia (mild, moderately, and severe); (d) recent diarrhoea; (e) wasted (z-score <-2 SD); (f) sex (being a boy) were significantly associated with lower mean Hb concentrations while increased age of child and duration of breastfeeding (6 months) had significantly higher Hb concentrations in children. This evidence concerns the gene GSTM1 and anemia.