of borderline significanceP = 0.057
Age under 15 years was a protective factor of borderline significance (partially adjusted OR = 0.616; 95% CI, 0.33–0.95, P = 0.057) in the first model, which also adjusted for sex, years of residence in Amazonia, Duffy blood group genotype, months elapsed since the beginning of the study, and wealth index quartiles.