Table 2. Poisson regression analysis of anti-merozoite IgG levels and clinical outcome for non-parasitized Ndiop inhabitants.

NDIOP		Bivariate analysis			Multivariate model
Category	Subcategory	RR	95%CI	P	RR	95%CI	P
anti-merozoite IgG level	(continous)	0.999	0.9985–0.9995	<0.001	1.000	0.9996–1.0004	NS
Age (years)	≥30	1			1		(<0.001)
	15–29	3.632	1.349–9.783	0.01	2.446	0.822–7.271	NS
	2–14	15.925	6.484–39.116	<0.001	16.432	5.954–45.350	<0.001
Deviance					87.8
AIC					89.8

Bivariate and multivariate Poisson regression models were built to analyze the relation between anti-merozoite IgG levels and acute malaria morbidity. The bivariate model includes morbidity and analysis of one variable. The multivariate model includes morbidity and other variables such as age and IgG levels, where the impact of the different variables is analyzed together. The P value in parenthesis refers to the overall impact of age on the multivariate model. (NS: non significant.)