Table 3.

Effects of interventions on malaria parasitaemia and anaemia in class three schoolchildren in KNDs, Ghana, by study arm

Variable	Arm 1 (N=131)	Arm 2 (N=90)	Arm 3 (N=127)
Prevalence of malaria parasitaemia
Before interventions	24.2, (2.5)	26.7, (4.1)	34.7, (3.4)
After interventions	9.0, (1,4)	10.9, (2.5)	31.6, (1.7)
p	0.001	0.001	0.148
Malaria parasite density (geometric mean) per 800 WBCs, (SD)
Before intervention	346, (38)	121, (76)	535, (136)
After intervention	212, (24)	114, (32)	368, (21)
p	0.531	0.741	0.350
Mean Hb (g/dl), (SD)
Before interventions	11.7, (2.5)	11.7, (1.2)	11.6, (1.1)
After interventions	11.8, (1.6)	11.6, (1.1)	11.6, (1.2)
p	0.745	0.631	0.701
Prevalence of anaemia, (95% CI)
Before interventions	19.8, (16.0–29.2)	26.7, (13.3–31.0)	28.3, (6.1–43.2)
After interventions	12.2, (8.3–14.7)	21.1, (15.4–28.5)	18.1, (15.8–27.6)
p	0.073	0.151	0.049

WBCs=white blood cells.