Table 2.

Mortality rate and knockdown in field populations of Anopheles gambiae s.l. for the different insecticides, southwestern Ethiopia

Insecticide	Number tested	% Knockdown at 60 minutes [95% CI]	Percentage mortality [95% CI]
DDT 4%	100	0% [0–4.3]*	1.0 [0.9–2.9]
Permethrin 0.75%	83	0% [0–3.6]*	18.1 [0.5–35.7]
Deltamethrin 0.05%	107	71.96% [65.1–78.8]	82.2 [77.2–87.3]

^*= exact (Clopper-Pearson) binomial confidence intervals (all other confidence intervals [CIs] are calculated, including the “tubes clustering” as specified in the text).