Logistic models to examine the effect of ITN use and transmission intensity on the category of malaria infection, and their interactions with age.

Odds ratios (OR) from logistic regression are shown, for the risk of febrile malaria compared with asymptomatic infection, and then for the risk of any malaria infection (i.e. asymptomatic infection or febrile malaria) with uninfected status. Children are divided into equal groups of younger (12–42 months) and older (42–80 months) children. The ORs are shown for the effect of ITN use according among the younger and then older children separately, and then the interaction term for ITN use and older age is shown by *. The same format is then used for the effect of residence at low transmission intensity (Low trans.).