Malaria incidence rates and anti-P. falciparum lysate IgG levels II. Correlation between the mean of anti-P. falciparum lysate IgG levels and malaria incidence rates of the respective study arm in each village. A, stratified by month of birth (Wald test, p = 0.118). B, stratified by village of residence (Wald test, p < 0.001). Blue circles and lines (linear regression), children from placebo arm; red diamonds and lines (linear regression), children from SP arm. PYAR, person year at risk.