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Table 3 Associations between infection in non-travellers and percentage of site residents who travelled to mainland

From: Infection importation: a key challenge to malaria elimination on Bioko Island, Equatorial Guinea

Year Age group years % of site residents who travelled to mainland EG in the previous 8 weeks Prevalence of P. falciparum infection in non-travellers Odds ratio (95% CI) p -value Adjusted odds ratio* (95% CI) p -value
% (N)
2013 2-14 <3.2% (5 sites) 10.2 (1,268) 1 0.001 1 0.004
   3.2% to <5% (5 sites) 28.9 (795) 2.58 (1.08-6.19) 2.50 (1.01-6.01)
   5 to <9% (4 sites) 26.5 (1,835) 3.60 (1.47-8.85) 5.07 (1.88-13.65)
   > = 9% (4 sites) 38.2 (2,261) 5.71 (2.33-14.01) 7.65 (2.34-24.96)
  >15 <1.5% (5 sites) 7.7 (1,188) 1 0.002 1 0.010
   1.5 to <5% (5 sites) 18.7 (992) 2.28 (1.14-4.60) 1.96 (1.04-3.67)
   5 to <10% (4 sites) 17.9 (2,280) 2.95 (1.26-4.54) 3.19 (1.60-6.35)
   > = 10% (4 sites) 22.7 (2,845) 3.84 (1.88-7.83) 3.10 (1.39-6.94)
2014 2-14 <1.5% (5 sites) 5.1 (942) 1 <0.001 1 <0.001
   1.5 to <5% (5 sites) 23.7 (946) 5.97 (2.56-13.88)   5.80 (3.18-10.59)  
   5 to <10% (4 sites) 22.0 (2,121) 7.14 (2.96-12.20)   3.98 (2.07-7.66)  
   > = 10% (4 sites) 18.9 (3,263) 4.60 (1.92-11.04)   5.31 (2.51-11.22)  
  >15 <1.5% (5 sites) 3.9 (875) 1 <0.001 1 <0.001
   1.5 to <5% (5 sites) 14.8 (911) 4.07 (2.35-7.05)   3.41 (2.02-5.76)  
   5 to <10% (4 sites) 14.6 (2,094) 4.06 (2.34-7.07)   2.39 (1.38-4.45)  
   > = 10% (4 sites) 12.3 (3,489) 3.07 (1.78-5.29)   2.45 (1.27-4.38)  
  1. *Adjusted for IRS coverage, net use, age, site level SCR, SES, and sleeping in a house with closed eaves.