Table 3.
Risk factors for houses of being infested with Aedes larvae
| Number of houses | Number of infested houses (%) | Unadjusted OR† | 95% CI | P-valueσ | Adjusted OR‡ | 95% CI | P-valueσ | |
|---|---|---|---|---|---|---|---|---|
| Type of houses | ||||||||
| Independent houses | 1890 | 352 (18.6) | 1.56 | 1.35–1.82 | < 0.001 | 1.57 | 1.35–1.83 | < 0.001 |
| Semi-permanent houses | 2801 | 364 (13.0) | 1.02 | 0.88–1.18 | 0.78 | 1.12 | 0.96–1.29 | 0.16 |
| Slum houses | 771 | 110 (14.3) | 1.01 | 0.57–1.79 | 0.96 | 0.96 | 0.54–1.70 | 0.89 |
| Multi-storey houses | 3651 | 466 (12.8) | 1 | 1 | ||||
| Had water storage system | ||||||||
| Yes | 2575 | 437 (17.0) | 1.50 | 1.29–1.75 | < 0.001 | 1.55 | 1.33–1.82 | < 0.001 |
| No | 6647 | 869 (13.1) | 1 | 1 | ||||
| Used mosquito spray/coil/smoke | ||||||||
| Yes | 3914 | 553 (14.1) | 1.01 | 0.89–1.13 | 0.94 | — | — | — |
| No | 5281 | 753 (14.3) | 1 | |||||
| Used insecticide during the last 1 month | ||||||||
| Yes | 6747 | 969 (14.4) | 1.06 | 0.93–1.27 | 0.36 | — | — | — |
| No | 2475 | 337 (13.6) | 1 | |||||
| Had fully/partly-shaded outdoor premises | ||||||||
| Yes | 4065 | 695 (17.1) | 1.55 | 1.38–1.75 | < 0.001 | 1.51 | 1.34–1.70 | < 0.001 |
| No | 2759 | 611 (22.1) | 1 | 1 | ||||
† Univariate logistic regression analysis
‡ Multivariate logistic regression analysis adjusted by the variables with p < 0.1 (i.e., type of houses, had water storage system, had fully/partly-shaded outdoor premises)
σ Wald chi-square test