Table 2.
Protective efficacy of personal protection methods compared to short untreated clothing for the dominant mosquito species Ae. albopictus and Ae. aegypti, and putative malaria vectors
| Dominant species | Clothing and treatment | Total no. collected | Average collections per collection day (95% CI) | Protective efficacy (95% CI) | P |
|---|---|---|---|---|---|
| Ae. albopictus (afternoon) | Short permethrin-treated | 627 | 22.4 (14.0–30.8) | 14.6 (-8.1–32.6) | 0.190 |
| Long permethrin-treated | 275 | 9.8 (6.2–13.5) | 54.0 (39.7–64.9) | <0.001* | |
| Short untreated + repellent | 329 | 11.8 (7.6–15.9) | 46.1 (27.9–59.7) | <0.001* | |
| Short permethrin-treated + repellent | 226 | 8.1 (5.0–11.1) | 61.6 (45.5–73.0) | <0.001* | |
| Short untreated + coil | 60 | 2.1 (0.9–3.4) | 91.7 (87.2–94.6) | <0.001* | |
| Long untreated | 657 | 23.5 (15.0–31.9) | 4.4 (-23.3–25.9) | 0.728 | |
| Short untreated | 672 | 24.0 (16.4–31.6) | |||
| Cx. vishnui (s.l.) (evening) | Short permethrin-treated | 1004 | 17.9 (13.3–22.5) | 12.0 (-19.8–35.3) | 0.417 |
| Long permethrin-treated | 681 | 12.1 (7.9–16.4) | 42.8 (21.6–58.3) | 0.001* | |
| Short untreated + repellent | 876 | 15.6 (10.6–20.7) | 22.5 (4.6–37.1) | 0.016* | |
| Short permethrin-treated + repellent | 586 | 10.5 (6.5–14.5) | 54.3 (34.6–68.1) | <0.001* | |
| Short untreated + coil | 410 | 7.3 (3.1–11.5) | 70.9 (39.0–86.1) | 0.001* | |
| Long untreated | 1045 | 18.7 (13.2–24.1) | 6.5 (-21.4–27.9) | 0.615 | |
| Short untreated | 1135 | 20.3 (15.2–25.4) | 1 | ||
| Putative malaria vectorsa (evening) | Short permethrin-treated | 44 | 0.8 (0.4–1.1) | -12.5 (-89.6–33.2) | 0.658 |
| Long permethrin-treated | 33 | 0.6 (0.3–0.9) | 23.2 (-13.9–48.3) | 0.189 | |
| Short untreated + repellent | 55 | 1.0 (0.4–1.6) | -27.3 (-116.8–25.2) | 0.374 | |
| Short permethrin-treated + repellent | 28 | 0.5 (0.3–0.7) | 29.3 (-11.6–55.1) | 0.137 | |
| Short untreated + coil | 32 | 0.6 (0.3–0.9) | 20.2 (-38.8–54.1) | 0.425 | |
| Long untreated | 42 | 0.8 (0.4–1.1) | -6.0 (-57.3–28.6) | 0.773 | |
| Short untreated | 39 | 0.7 (0.4–1.0) | 1 |
Notes: Results are shown using generalized estimating equations and 95% confidence interval (CI). Afternoon collections were undertaken from 12:00 to 18:00 h in the secondary forest of Silalek village. The evening collections were undertaken from 17:00 to 23:00 h at the primary school of Thinkeo village
aPutative malaria mosquitoes An. barbumbrosus (s.l.), An. barbirostris (s.l.), An. dirus (s.l.), An. maculatus (s.l.) and An. minimus (s.l.)
*P < 0.05