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Table 1 Efficacy of 4 repellent formulations tested 4 and 5 hours after application during Study A in Guatemala

From: A low-cost repellent for malaria vectors in the Americas: results of two field trials in Guatemala and Peru

   Hours post application
Treatment   4 5 Mean 95 % C.I.
Filler mix control AM 115.52 100.48 108.00 55.13 – 96.39
  WM 79.83 66.64 72.74a  
  % P -- -- --  
C15 AM 1.28 5.04 3.16 0.46 – 01.38
  WM 0.64 1.40 0.96b  
  % P 98.89 94.98 97.07  
T15 AM 1.36 1.44 1.40 00.43 – 01.17
  WM 0.79 0.72 0.76b  
  % P 98.82 98.57 98.70  
T20 AM 0.84 1.84 1.34 0.28 – 00.97
  WM 0.43 0.77 0.59b  
  % P 99.27 98.17 98.76  
15 % DEET AM 6.08 11.72 8.90 2.68 – 06.38
  WM 3.63 4.87 4.21c  
  % P 94.74 88.34 91.76  
  1. AM = arithmetic mean mosquito landings per person hour.
  2. WM = William's mean mosquito landings per person hour. Means followed by different letters are significantly different.
  3. % P = Percentage protection i.e. 100 - ((mosquito landings on treatment ÷ mosquito landings on control) × 100).