Effect of dietary intervention on the prevalence of asymptomatic malaria among 6–18-month-old children in rural Malawi

Table 3 Prevalence of malaria at each study visit by the intervention group

Visit	The proportion of positive malaria tests by intervention group^a					Comparison between control and intervention groups^b,c
						Control vs. CSB		Control vs. Milk-LNS		Control vs. Soy-LNS
	Control	CSB	Milk-LNS	Soy-LNS	Global P-value	PR (95% CI)	P-value	PR (95% CI)	P-value	PR (95% CI)	P-value
All ages combined	12.1 % (63/519)	17.2 % (90/522)	12.2 % (66/541)	14.0 % (73/520)	0.023	1.72 (1.19, 2.49)	0.004	1.19 (0.81, 1.74)	0.372	1.32 (0.88, 1.96)	0.177
9 months	6.8 % (10/146)	12.4 % (17/137)	8.1 % (12/149)	7.5 % (10/134)	0.088	2.63 (1.20 to 5.75)	0.015	1.60 (0.68 to 3.76)	0.286	1.66 (0.68 to 4.06)	0.267
12 months	8.5 % (11/129)	15.5 % (20/129)	10.1 % (14/139)	10.9 % (14/128)	0.329	1.86 (0.92 to 3.76)	0.083	1.29 (0.59 to 2.82)	0.531	1.33 (0.62 to 2.90)	0.465
15 months	8.7 % (9/104)	18.5 % (22/119)	8.3 % (9/108)	15.6 % (19/122)	0.015	3.24 (1.46 to 7.17)	0.004	1.50 (0.57 to 3.90)	0.411	2.53 (1.13 to 5.66)	0.024
18 months	23.6 % (33/140)	22.6 % (31/137)	21.4 % (31/145)	22.1 % (30/136)	0.957	1.02 (0.64 to 1.61)	0.936	1.00 (0.63 to 1.60)	0.988	0.90 (0.56 to 1.45)	0.671

PR: Prevalence ratio; CI: Confidence interval; CSB: Corn-soy blend; Milk-LNS: Milk-powder containing lipid-based nutrient supplement; Soy LNS: Soy flour containing lipid-based nutrient supplement
^aUnadjusted proportion of malaria prevalence
^bPrevalence ratio, obtained using a modified Poisson regression (with a robust variance estimator). The clustering of participants was taken into account for combined time points
^cAdjusted for malaria at baseline, season of sample collection, site of enrolment, and household asset Z-score

ISSN: 1475-2875