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Table 2 Falciparum malaria incidence per 1,000 weeks exposure in ITN and control villages (from 10 May 1998 to 28 February 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

  ITN villages Control villages ITN Protective efficacy
  N Pf episodes per 1,000 weeks exposure N Pf episodes per 1,000 weeks exposure Rate ratio Rate difference
Dabhine         
Pair 1 677 4.04 (97 /24034) 715 15.25 (376 /24662) 0.26 −11.21
Pair 2 522 7.37 (137 /18592) 653 3.51 (83 /23625) 2.09 +3.86
Pair 3 429 1.57 (24 /15304) 280 9.38 (91 /9697) 0.17 −7.81
Pair 4 208 2.83 (21 /7411) 171 8.03 (48 /5980) 0.35 −5.20
Pair 5 67 2.13 (5 /2343) 71 13.32 (33 /2477) 0.16 −11.19
Myothugyi         
Pair 6 74 3.68 (9 /2447) 44 3.84 (6 /1562) 0.96 −0.16
Pair 7 737 0.23 (6 /26632) 786 0.46 (13 /28427) 0.50 −0.23
Pair 8 482 0.06 (1 /17344) 595 0.97 (21 /21637) 0.06 −0.91
Pair 9 653 1.61 (37 /22973) 631 0.57 (13 /22852) 2.82 +1.04
Pair 10 140 2.90 (14 /4824) 107 7.68 (29 /3775) 0.38 −4.78
Total 3,989 2.47 (351 /141903) 4053 4.93 (713 /144694) weighted paired t-test p = 0.216