GSTM1 and malaria: Using a multilinear regression model with each haematological variable as the dependent variable, to examine the influence of age, gender, knowledge on malaria, ITN use, effective ITN use and parasitaemia status on each haematological variable; it was observed that age negatively correlated with WBC (P < 0.001) and positively correlated with Hb (P = 0.013), MCV (P < 0.001) and MCH (P < 0.001).