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Table 4 Plasmodium falciparum, Plasmodium vivax and splenomegaly prevalences (%) in ITN and control clusters during the peak season at the end of the study (January 1999)

From: The effect of insecticide-treated bed nets on the incidence and prevalence of malaria in children in an area of unstable seasonal transmission in western Myanmar

  N N P. falciparum P. vivax Spleen
  ITN NN ITN NN Prevalence difference ITN NN Prevalence difference ITN NN Prevalence difference
Dabhine            
Pair 1 659 708 31 (5) 107 (15) - 10.4 183 (28) 280 (40) - 11.8 170 (26) 432 (61) - 35.2
Pair 2 508 644 39 (8) 35 (5) + 2.3 120 (24) 135 (21) + 2.7 155 (31) 131 (20) + 10.2
Pair 3 413 268 17 (4) 21 (8) - 3.7 57 (14) 83 (31) - 17.2 63 (15) 90 (34) - 18.3
Pair 4 203 169 10 (5) 6 (4) + 1.4 23 (11) 25 (15) - 3.5 56 (28) 74 (44) - 16.2
Pair 5 62 71 3 (5) 7 (10) - 5.0 23 (37) 22 (31) + 7.1 23 (38) 31 (44) - 5.9
Myothugyi            
Pair 6 65 43 14 (22) 3 (7) + 14.6 7 (11) 1 (2) + 8.4 11 (17) 4 (9) + 7.6
Pair 7 717 763 2 (0) 5 (1) - 0.4 0 (0) 0 (0) 0 6 (1) 23 (3) - 2.2
Pair 8 462 580 0 (0) 6 (1) - 1.0 1 (0) 4 (1) - 0.7 1 (0) 9 (2) - 1.3
Pair 9 627 620 5 (1) 3 (0) + 0.3 9 (1) 2 (0) + 1.1 11 (2) 3 (0) + 1.3
Pair 10 143 103 40 (28) 32 (31) - 3.1 23 (16) 12 (12) + 4.4 37 (26) 23 (22) + 3.5
Total 3859 3969 161 (4) 225 (6)   446 (12) 564 (14)   533 (14) 818 (21)  
Weighted Paired t-test    Pf : -1.9% (−5.8%, 2.0%), Pv : -2.8% (−8.5%, 2.9%), Spleen : -7.3% (−20.1%, 5.5%),
p-value = 0.30 p-value = 0.30 p-value = 0.23
  1. P. falciparum% and P. vivax% indicate the percentage of children with P. falciparum or P. vivax parasitaemia, both values include mixed infections. ITN: insecticide treated nets, NN: no nets.