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Table 3 Associations between malaria infection and outdoor exposure in children aged 2 – 14 on Bioko in 2013

From: Outdoor biting by Anopheles mosquitoes on Bioko Island does not currently impact on malaria control

  

Infection prevalence %, (N)

Odds ratio (95% CI)

p -value

Adjusted odds ratio* (95% CI)

p -value

Child spent any time outside between the hours of 7 pm and 6 am

No

27.1 (4920)

1

0.20

1

0.87

Yes

29.2 (1357)

1.11 (0.94 - 1.31)

0.98 (0.82 - 1.17)

Estimated number of outdoor bites received by child

0

27.7 (4122)

1

0.12

1

0.17

> 0 to <1

30.25 (628)

1.13 (0.90 – 1.44)

1.11 (0.83 – 1.50)

≥ 1 to < 4

23.6 (670)

0.81 (0.63 – 1.04)

0.74 (0.55 – 1.01)

≥ 4

31.8 (189)

1.22 (0.83 – 1.78)

1.09 (0.61 – 1.94)

Site level percentage of bites which occur outdoors

< 16%

27.7 (775)

1

0.31

1

0.70

16% to 18%

16.1 (1111)

0.50 (0.14 – 1.73)

0.44 (0.10 – 2.00)

18% to 21%

28.6 (2703)

1.04 (0.42 – 2.60)

0.87 (0.19 – 4.12)

> 21%

34.5 (1570)

1.37 (0.60 – 3.15)

0.98 (0.20 – 4.93)

  1. *Adjusted for spray coverage, net use, age, site level SCR, SES, age, sex, sleeping in a house with closed eaves and travelling off the island.