Variable | 2010 (end of transmission season) | 2011 (end of transmission season) | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
P. falciparum infection at end of season n/N (%) | Univariable analysis | Multivariable analysis | P. falciparum infection at end of season n/N (%) | Univariable analysis | Multivariable analysis | |||||
OR (95% CI) | p value | OR (95% CI) | p value | OR (95% CI) | p value | OR (95% CI) | p value | |||
Gender | ||||||||||
 Male | 99/796 (12.4%) | 1 | – | 1 | – | 173/836 (20.7%) | 1 | – | 1 | – |
 Female | 123/747 (16.5%) | 1.45 (1.08–1.96) | 0.01 | 1.47 (1.08–1.98) | 0.01 | 123/728 (16.9%) | 0.74 (0.57–0.97) | 0.03 | 0.73 (0.56–0.96) | 0.02 |
Age of child (yrs) | – | 1.06 (1.02–1.10) | 0.007 | 1.06 (1.02–1.10) | 0.007 | – | 1.13 (1.08–1.17) | < 0.001 | 1.12 (1.08–1.17) | < 0.001 |
Child slept under an LLIN the previous night | ||||||||||
 No | 20/142 (14.1%) | 1 |  |  |  | 26/83 (31.3%) | 1 | – |  |  |
 Yes | 202/1400 (14.4%) | 1.10 (0.64–1.87) | 0.74 |  |  | 268/1479 (18.1%) | 0.44 (0.26–0.74) | 0.002 | 0.49 (0.28–0.83) | 0.009 |
Study arm | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 LLIN only | 87/763 (11.4%) | 1 | – |  |  | 153/823 (18.6%) | 1 | – | 1 | – |
 LLIN and IRS | 135/780 (17.3%) | 1.51 (0.83–2.76) | 0.18 |  |  | 143/741 (19.3%) | 1.20 (0.69–2.09) | 0.53 |  |  |
Bank of River Gambia | ||||||||||
 North | 118/812 (14.5%) | 1 | – |  |  | 110/760 (14.5%) | 1 | – |  |  |
 South | 104/731 (14.2%) | 1.05 (0.57–1.96) | 0.87 |  |  | 186/804 (23.1%) | 1.77 (1.05–2.97) | 0.03 |  |  |
House construction | ||||||||||
 Open eaves | 124/848 (14.6%) | 1 | – |  |  | 183/872 (21.0%) | 1 | – |  |  |
 Closed eaves | 79/609 (13.0%) | 0.91 (0.63–1.30) | 0.59 |  |  | 113/692 (16.3%) | 0.81 (0.60–1.09) | 0.16 |  |  |
Cluster level prevalence of [values in square brackets refer to OR for a 10% increase] | ||||||||||
 Any Vgsc-1014 mutation | – | 1.02 (1.00–1.04) [1.20 (0.96-1.51)] | 0.10 |  |  | – | 1.01 (1.00–1.02) [1.10 (0.97–1.25)] | 0.13 |  |  |
 Homozygous Vgsc-1014F | – | 1.02 (1.00–1.05) [1.25 (0.99-1.58)] | 0.07 | a |  | – | 1.01 (1.00–1.02) [1.13 (1.01–1.27)] | 0.04 | a |  |
 An. gambiae s.s. | – | 1.02 (1.00–1.04) [1.27 (1.03–1.55)] | 0.02 | a |  | – | 1.01 (1.00–1.02) [1.12 (1.01–1.25)] | 0.03 | a |  |