Skip to main content
. Author manuscript; available in PMC: 2023 Jul 24.
Published in final edited form as: Lancet Microbe. 2023 Apr 20;4(6):e461–e469. doi: 10.1016/S2666-5247(23)00063-0

Table 1:

Survey samples

Survey 1 Survey 2 Survey 3

Dates Oct 10–15, 2018 April 1–8, 2019 Sept 12–17, 2019
Season Late rainy season Late dry season Peak rainy season
Sampling design* Household-based Concession-based Concession-based
Village sectors sampled, n 7 7 7
Concessions sampled, n 102 51 51
Sleeping households sampled, n 102 255 270
Participants, n 452 388 643
 Mean per concession (SD) 4·5 (2·3) 7·6 (5·3) 12·6 (7·2)
 Participants aged <5 years, n/N (%) 56/334 (17%) 94/385 (24%) 112/634 (18%)
 Participants aged 5–18 years, n/N (%) 134/334 (40%) 109/385 (28%) 233/634 (37%)
 Participants aged >18 years, n/N (%) 144/334 (43%) 182/385 (47%) 289/634 (46%)
 Mean age (SD) 20 (19) 19 (18) 20 (18)
 Female participants, n/N (%) 276/448 (62%) 239/387 (62%) 385/640 (60%)
 Male participants, n/N (%) 172/448 (38%) 148/387 (38%) 255/640 (40%)
Blood-fed mosquitos 1020 371 760
 Mean per household (SD) 10·0 (0·0) 1·5 (2·2) 3·7 (2·8)
 Mean per concession (SD) 10·0 (0·0) 7·3 (6·8) 14·9 (8·3)
Anopheles gambiae complex, proportion of mosquitoes captured. NC 0·97 0·99

NC=not collected.

*

Survey 1 used household-based sampling, in which one household was randomly selected per concession, whereas surveys 2 and 3 used concession-based sampling, where all households were sampled within a selected concession.

We set a maximum of ten blood-fed mosquitos collected per household. In Survey 1, in which only one household in selected concessions was sampled, this maximum was reached for all households