Table 3 Association between explanatory variables and the odds ratio of having any Vgsc-1014 mutation
Variable | Proportion with any Vgsc-1014 mutation n/N (%) | Univariable analysis (adjusted for clustering on village) | Multivariable analysis | ||||
|---|---|---|---|---|---|---|---|
OR | 95% CI | p value | OR | 95% CI | p value | ||
Species | |||||||
 An. arabiensis | 1137/3997 (28.4%) | 1 |  |  |  |  |  |
 An. gambiae s.s. | 751/835 (89.9%) | 20.31 | 15.92–25.91 | < 0.001 | 18.49 | 14.48–23.61 | < 0.001 |
 An. coluzzii | 178/691 (25.8%) | 0.84 | 0.70–1.02 | 0.08 | 0.76 | 0.63–0.92 | 0.004 |
Study arm | |||||||
 LLIN only | 1065/3287 (32.4%) | 1 |  |  |  |  |  |
 DDT-IRS and LLIN | 1037/2302 (45.0%) | 1.50 | 1.04–2.17 | 0.03 | 1.27 | 1.03–1.55 | 0.02 |
Year | |||||||
 2010 | 1388/4164 (33.3%) | 1 |  |  |  |  |  |
 2011 | 714/1425 (50.1%) | 2.08 | 1.82–2.37 | < 0.001 | 1.80 | 1.56–2.09 | < 0.001 |
Distance from the river (km) | – | 1.13 | 1.08–1.18 | < 0.001 |  |  |  |
Bank of River Gambia | |||||||
 North | 975/2863 (34.1%) | 1 |  |  |  |  |  |
 South | 1127/2726 (41.3%) | 1.60 | 1.10–2.33 | 0.02 |  |  |  |
Parity in village (%) | – | 1.19 | 0.07–21.47 | 0.91 |  |  |  |
Mean female An. gambiae s.l. density trap/night/village | – | 0.94 | 0.86–1.03 | 0.17 |  |  |  |
LLIN use in village (%) | – | 0.70 | 0.02–22.22 | 0.84 |  |  |  |