Table 2.
Results of univariate and multivariate regression analysis of different habitat characteristics and their association with presence of An. funestus larvae
| Larval habitat | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
| Odds (95% LC, UC) | P-values | Odds (95% LC, UC) | P-values | |
| Water movement | ||||
| Stagnant | 1 | 1 | ||
| Slow | 1.94 [0.72, 5.21] | 0.189 | 3.71 [0.81, 17.00] | 0.091 |
| Habitat shading (density of tree canopy) | ||||
| None | 1 | 1 | ||
| Partial | 1.16 [0.47, 2.87] | 0.750 | 0.84 [0.22, 3.24] | 0.795 |
| Heavy | 2.53 [0.82, 7.83] | 0.107 | 7.35 [1.04, 51.78] | < 0.05 |
| Water depth | ||||
| Less than 50 cm | 1 | 1 | ||
| Greater than 50 cm | 2.17 [0.95, 4.96] | 0.067 | 5.72 [1.40, 23.42] | < 0.05 |
| Distance to human dwellings | ||||
| Less than 100 m | 1 | 1 | ||
| Greater than 100 m | 0.54 [0.21, 1.35] | 0.186 | 0.43 [0.12, 1.49] | 0.184 |
| Water type | ||||
| Semi-permanent | 1 | 1 | ||
| Permanent | 3.16 [1.39, 7.23] | < 0.01 | 3.07 [0.86, 10.99] | 0.085 |
| Vegetation type | ||||
| None | 1 | 1 | ||
| Submerged | 0.73 [0.07, 7.95] | 0.799 | 0.55 [0.21, 1.42] | 0.216 |
| Emergent | 7.63 [2.03, 28.70] | < 0.01 | 1.96 [0.66, 5.78] | 0.966 |
| Floating | 2.44 [0.53, 11.17] | 0.249 | 0.92 [0.03, 31.86] | 0.962 |
| Water colour | ||||
| Clear | 1 | 1 | ||
| Coloured | 0.17 [0.06, 0.47] | < 0.001 | 0.10 [0.02, 0.46] | < 0.01 |
| Polluted | 0.11 [0.01, 0.97] | < 0.05 | 0.15 [0.01, 1.72] | 0.127 |
| Vegetation quantity | ||||
| None | 1 | 1 | ||
| Scarce | 2.50 [0.65, 9.60] | 0.182 | 12.62 [1.76, 90.55] | < 0.05 |
| Moderate | 10.11 [2.31, 44.35] | < 0.01 | 20.03 [2.41, 166.2] | < 0.01 |
| Abundant | 11.67 [1.79, 76.01] | < 0.05 | 22.96 [1.33, 395.7] | < 0.05 |
| Algae quantity | ||||
| None | 1 | 1 | ||
| Scarce | 1.60 [0.67, 3.82] | 0.293 | 5.40 [1.35, 21.64] | < 0.05 |
| Moderate | 0.67 [0.13, 3.48] | 0.631 | 0.50 [0.03, 7.97] | 0.623 |
| Habitat size | ||||
| Less than 10 m | 1 | 1 | ||
| Between 10 and 100 m | 3.10 [1.33, 7.21] | < 0.01 | 1.37 [0.37, 5.04] | 0.638 |
| Greater than 100 m | 3.69 [0.47, 28.78] | 0.212 | 1.17 [0.08, 17.07] | 0.910 |