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Table 2 Comparison of overall prevalence and geometric mean parasite density of malaria infection, mean Hb levels and anaemia after one and two years of anthelmintic treatment by randomization groups

From: The impact of anthelmintic treatment intervention on malaria infection and anaemia in school and preschool children in Magu district, Tanzania: an open label randomised intervention trial

Variable/randomization group Baseline 12 months follow up 24 months follow up
Prevalence of P. falciparum infection (n,%)    
 Intervention 123 (33.2) 145 (44.9) 74 (24.9)
 Control 123 (31.2) 137 (42.4) 70 (24.0)
p-value 0.567 0.526 0.790
Intensity of P. falciparum infection (95% CI)    
 Intervention 530 (414-678) 833 (664-1048) 326 (279-382)
 Control 510 (403-645) 906 (724-1133) 343 (294-400)
p-value 0.825 0.608 0.658
Prevalence of anaemia (n,%)    
 Intervention 142 (36.0) 120 (37.2) 43 (14.5)
 Control 134 (36.1) 112 (34.7) 38 (13.0)
p-value 0.971 0.806 0.634
Prevalence of severe anaemia (n,%)    
 Intervention 5 (1.3) 1 (0.3) -
 Control 4 (1.1) 1 (0.3) -
p-value NA NA NA
Mean haemoglobin level in g/L (95% CI)    
 Intervention 122.0 (120.5-123.4) 123.5 (121.9-125.0) 136.0 (134.2-137.8)
 Control 123.0 (121.6-124.5) 123.2 (121.7-124.6) 136.8 (135.0-137.7)
p-value 0.270 0.749 0.494