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Table 3 Mean numbers of mosquitoes of different species caught each night in the four adjacent wards of Ifakara, relative to the numbers caught in Ifakara Mjini (the main town centre)

From: Dramatic decreases of malaria transmission intensities in Ifakara, south-eastern Tanzania since early 2000s

Species Wards Mosquito catches indoors Mosquito catches outdoors
Total no. mosquitoes Adjusted means [UC–LC] RR [UC–LC] P-values Total no. mosquitoes Adjusted means [UC–LC] RR [UC–LC] P-values
Anopheles arabiensis Ifakara Mjini 154 0.42 [0.25–0.70] 1 N/A 269 0.29 [0.17–0.51] 1 N/A
Katindiuka 2337 5.81 [3.53–9.56] 13.8 [6.9–27.6] < 0.001 2318 3.28 [1.98–5.42] 11.2 [5.33–23.7] < 0.001
Lipangalala 254 0.16 [0.09–0.30] 0.4 [0.2–0.8] < 0.05 531 0.10 [0.05–0.19] 0.3 [0.14–0.79] < 0.05
Mlabani 580 0.22 [0.12–0.39] 0.5 [0.2–1.1] 0.084 939 0.31 [0.18–0.53] 1.1 [0.48–2.29] 0.898
Viwanja Sitini 225 0.64 [0.38–1.07] 1.5 [0.7–3.1] 0.257 188 0.54 [0.32–0.92] 1.9 [0.87–4.00] 0.11
Anopheles funestus Ifakara Mjini 7 0.002 [0–0.02] 1 N/A 10 0.02 [0.01–0.05] 1 N/A
Katindiuka 189 0.49 [0.25–0.97] 212.7a [24.1–1881] < 0.001 116 0.10 [0.05–0.18] 4.5 [1.68–14.78] < 0.001
Lipangalala 35 0.03 [0.01–0.10] 14.5a [1.6–132.0] < 0.05 4 0 [0–0] 0 [0–0] 0.802
Mlabani 16 0.01 [0.003–0.04] 5.0 [0.5–53.9] 0.184 19 0.03 [0.01–0.07] 1.4 [0.39–4.83] 0.627
Viwanja Sitini 1 0.002 [0–0.02] 1.1 [0.1–21.2] 0.942 3 0.01 [0.002–0.03] 0.4 [0.07–2.24] 0.298
  1. The catch densities are also illustrated in maps in Fig. 6
  2. aExcessively dispersed data not tractable by the generalized linear mixed models, mostly because of very low-densities of An. funestus mosquitoes