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Table 3 Knock-down and 24 hour mortality in contact bioassays on the inside surface of insecticide-treated tents after weathering.

From: Tents pre-treated with insecticide for malaria control in refugee camps: an entomological evaluation

   Unweathered 1 month weathering 2 months weathering 3 months weathering
Knock-down 1 h after exposure 3-minute exposure 100%
(100 – 100)
100%
(100 – 100)
92.9%
(85.2 – 96.8)
81.2%
(74.8 – 87.8)
  10-minute exposure 100%
(100 – 100)
96.3%
(89.3 – 98.8)
85.2%
(76.2 – 91.2)
93.0%
(88.1 – 96.0)
Mortality 24 h after exposure 3-minute exposure 93.2%
(84.8 – 97.2)
100%
(100 – 100)
63.5%
(52.8 – 73.0)
83.0%
(76.7 – 87.8)
  10-minute exposure 97.4%
(90.2 – 99.3)
97.6%
(90.8 – 99.4)
80.7%
(71.1 – 87.6)
91.3%
(86.0 – 94.7)
  1. Notes: 1. Mean percentage knock-down, mortality and 95% confidence limits are back-transformed from values calculated by the blocked logistic regression model. 2. Tests on an untreated tent were carried out as a control. 24 hr mortality was never more than 5%.