Table 2.

Prevalence of seropositivity to three malarial antigens in children who received seasonal malaria chemoprevention (SMC) for 2 years or for 4 years

	n	%	95% CI	Unadjusted			Adjusteda
				OR	95% CI	p	OR	95% CI	p
AMA1
SMC 2 years	215	88.8	84.5–92.8	Ref	–	–	Ref	–	–
SMC 4 years	205	95.3	92.5–98.2	2.57	1.22–5.45	0.014	3.16	1.44–6.95	0.004
MSP-142
SMC 2 years	208	86.0	81.5–90.4	Ref	–	–	Ref	–	–
SMC 4 years	183	85.1	80.3–90.0	0.93	0.55–1.58	0.8	1.06	0.62–1.80	0.8
CSP
SMC 2 years	196	81.9	76.0–86.0	Ref	–	–	Ref	–	–
SMC 4 years	197	91.2	87.0–95.4	2.57	1.43–4.59	0.001	3.14	1.70–5.76	< 0.001

SMC 2 years = received SMC for 2 years; SMC 4 years = received SMC for 4 years

^aadjusted for age, gender and malaria infection