Fig. 1From: IgM and IgG against Plasmodium falciparum lysate as surrogates of malaria exposure and protection during pregnancyAssociation between placental infection and antibody levels by parity. Multivariate regression analysis adjusted by peripheral infection, age, neighbourhood, household indoor residual spraying, use of insecticide treated nets and season. Y axis represents the proportional increase in the level of antibodies in women with a placental infection compared to uninfected women among primigravida (a), secundigravida (b) and multigravida (c). *If the p value for the interaction term between parity and antibody levels was < 0.05Back to article page