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Table 4 Associations between prevalence and outdoor exposure in those aged 15 or over 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
Individual spent any time outside between the hours of 7 pm and 6 am No 17.4 (3100) 1 0.20 1 0.88
Yes 18.9 (3645) 1.11 (0.94 – 1.31) 1.00 (0.84 – 1.18)
Estimated number of outdoor bites received by individual 0 17.2 (3131) 1 0.56 1 0.41
> 0 to < 1 17.9 (709) 1.04 (0.77 – 1.44) 0.80 (0.60 – 1.08)
≥ 1 to <4 18.5 (1519) 1.09 (0.89 – 1.33) 0.90 (0.70 – 1.16)
≥ 4 19.2 (1107) 1.15 (0.94 – 1.40) 0.88 (0.72 – 1.08)
Site level percentage of bites which occur outdoors < 16% 17.6 (839) 1 0.54 1 0.84
16% to 18% 14.8 (974) 0.80 (0.27 – 2.39) 0.73 (0.21 – 2.60)
18% to 21% 17.5 (3521) 0.98 (0.47 – 2.06) 0.98 (0.30 – 3.20)
> 21% 21.5 (1971) 1.22 (0.62 – 2.40) 1.07 (0.33 – 3.51)
  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.