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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

From: Field evaluation of personal protection methods against outdoor-biting mosquitoes in Lao PDR

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

 
  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
  2. aPutative malaria mosquitoes An. barbumbrosus (s.l.), An. barbirostris (s.l.), An. dirus (s.l.), An. maculatus (s.l.) and An. minimus (s.l.)
  3. *P < 0.05