Table 1:
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