Table 3 Multivariable analysis: factors associated with the presence or absence of anopheline larvae.
Variables | All anophelines | An. gambiae s.l. | ||||||
|---|---|---|---|---|---|---|---|---|
| Â | Wald | Odds Ratio (OR) | 95% OR | P | Wald | Odds Ratio (OR) | 95% OR | P |
Spatial measurements | ||||||||
Distance from landward edge of transect | ||||||||
1–100 m |  | 1.00 |  |  |  | 1.00 |  |  |
200–500 m | 40.5 | 0.04 | 0.01–0.10 | <0.001 | 13.15 | 0.13 | 0.04–0.39 | <0.001 |
Position of sampling point within rice field | ||||||||
Landward edge | Â | 1.00 | Â | Â | Â | 1.00 | Â | Â |
Centre | 4.97 | 0.23 | 0.06–0.84 | 0.026 | 5.75 | 0.10 | 0.02–0.66 | 0.016 |
Riverside edge | 3.95 | 0.31 | 0.10–0.98 | 0.047 | 2.42 | 0.33 | 0.08–1.34 | 0.081 |
Biotic measurements | ||||||||
Rice in area samples | ||||||||
Absent | Â | 1.00 | Â | Â | Â | 1.00 | Â | Â |
Present | 13.78 | 28.25 | 4.84–164.85 | <0.001 | 7.01 | 10.53 | 1.84–60.16 | 0.008 |
Culicine larvae | ||||||||
Absent | Â | 1.00 | Â | Â | Â | 1.00 | Â | Â |
Present | 9.72 | 2.78 | 1.46–5.30 | 0.002 | 14.23 | 6.06 | 2.38–15.44 | <0.001 |
Insect biodiversity | ||||||||
|  | 2.92 | 2.16 | 0.89–5.20 | 0.087 | 0.17 | 1.21 | 0.50–2.95 | ns |