Indoor residual spraying insecticide treatment regimen | Absolute numbers caught | Mean catchesa | Relative biting rates of An. funestus | |
---|---|---|---|---|
[95Â % Confidence interval (CI)] | (RR)a [95Â % CI] | P value | ||
Deltamethrin WG) | ||||
 1–3 months since last spray | 73 | 0.112 [0.641, 0.371] | 0.99 [0.63, 1.56] | 0.897 |
 4–6 months since last spray | 1229 | 0.641 [0.371, 1.109] | 3.98 [3.15, 5.04] | <0.001 |
 7–12 months since last spray | 134 | 0.111 [0.062, 0.199] | 0.86 [0.64, 1.17] | 0.067 |
 >12 months since last spray or never | 1186 | 0.189 [0.113, 0.317] | 1 [NA]b | NAb |
Lambdacyhalothrin CS | ||||
 1–3 months since last spray | 20 | 0.191 [0.090, 0.405] | 1.03 [0.56, 1.88] | 0.805 |
 4–6 months since last spray | 6 | 0.055 [0.022, 0.141] | 0.17 [0.08, 0.39] | <0.001 |
 7–12 months since last spray | 0 | NEc | NEc | 0.972 |
 >12 months since last spray or never | 182 | 0.198 [0.121] | 1 [NA]b | NAb |
Pirimiphosmethyl EC | ||||
 1–3 months since last spray | 478 | 0.234 [0.131, 0.417] | 1.04 [0.83, 1.30] | 0.786 |
 4–6 months since last spray | 346 | 0.055 [0.030, 0.098] | 0.25 [0.20, 0.33] | <0.001 |
 7–12 months since last spray | 160 | 0.159 [0.086, 0.293] | 0.69 [0.50, 0.95] | 0.151 |
 >12 months since last spray or never | 2823 | 0.234 [0.131, 0.417] | 1 [NA]b | NAb |
Pirimiphosmethyl CS | ||||
 1–3 months since last spray | 14 | 0.021 [0.009, 0.047] | 0.07 [0.04, 0.13] | <0.001 |
 4–6 months since last spray | 70 | 0.004 [0.002, 0.008] | 0.02 [0.01, 0.02] | <0.001 |
 7–12 months since last spray | NEc | NEc | NEc | NEc |
 >12 months since last spray or never | 2087 | 0.253 [0.152, 0.422] | 1 [NA]b | NA |