Table 2.

Malaria case incidence in children aged 6 months to 10 years

	Control group			Intervention group			Hazard ratio	p value
	Number of clinical malaria episodes	Follow-up time, child-years	Incidence per child-year (95% CI)	Number of clinical malaria episodes	Follow-up time, child-years	Incidence per child-year (95% CI)
Overall	3635	1597·7	2·29 (1·97–2·61)	2355	1655·6	1·43 (1·21–1·65)	0·62 (0·51–0·76)	<0·0001
Year 1	1079	735·3	1·47 (1·28–1·67)	778	762·3	1·02 (0·92–1·12)	0·70 (0·59–0·82)	<0·0001
Year 2	2556	862·4	3·00 (2·52–3·48)	1577	893·4	1·79 (1·41–2·17)	0·60 (0·47–0·78)	<0·0001

Hazard ratios derived from Cox regression, with robust standard errors for cluster, are presented.