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Table 1 Efficacy of topical repellents against Plasmodium falciparum

From: Are topical insect repellents effective against malaria in endemic populations? A systematic review and meta-analysis

Study Repellent Control Risk ratio (95% confidence intervals)
  Cases Population at risk Cases Population at risk
Chen-Hussey et al.[34] 35 3,947 33 3,961 1.06 (0. 66-1.71)
Dadzie et al.[31] 54 205 47 204 1.14 (0.81-1.61)
Deressa et al.1[29] 23 2,399 19 2,273 1.15 (0.63 - 2.10)
Dutta et al.[32] - - -   Yr 1: 1.16 (0.85-1.58)
  Yr 2: 1.20 (0.83-1.72)
Hill et al.[33] 1 2,041 6 1,967 0.16 (0.02-1.33)
Kroeger et al.2[37] 8.5%   6.7%   1.273
McGready et al.4[36] 40 379 30 202 0.71 (0.46-1.11)
Sangoro et al.5[30] 115 2,224 137 2,202 0.83 (0.65-1.06)
Rowland et al.[35] 23 618 47 530 0.42 (0.26-0.68)
  1. 1Denominator is average of two follow up surveys, number of infections is combined total from two follow-up surveys - based on assumption that infections at 2-month time point were new infections (1 month between follow-up surveys); 2Trial conducted in two sites. This data is from Ecuador where according to manuscript 86% of cases were usually due to P. falciparum. Since parasite species of cases was not determined, these cases were attributing to P. falciparum; 3Counts and denominators not reported in manuscript so unable to calculate 95% confidence intervals; 4Cases and denominator back-calculated from percentages and confidence intervals reported in paper; 5number of cases/denominator taken from published manuscript not study report.