Table 3. Descriptive statistics and univariable multilevel mixed-effects logistic analyses for 280 houses located in rural villages.
| Variables | Category / Range | Freq. | Percentage / Mean | Unadjusted OR (95%CI) | ||
|---|---|---|---|---|---|---|
| Outcome variable | ||||||
| 1. House infested by T. dimidiata | No | 239 | 85.4% | - | ||
| Yes | 41 | 14.6% | - | |||
| House construction | ||||||
| 2. Predominant wall material | Concrete or block | 131 | 46.8% | Ref. | ||
| Adobe (plastered) | 93 | 33.2% | 1.09 (0.46, 2.58) | |||
| Adobe (not plastered) | 26 | 9.3% | 2.11 (0.64, 6.94) | |||
| Bajareque or wood | 30 | 10.7% | 3.63 (1.17, 11.2) | * | ||
| 3. Predominant roof material | Zinc | 175 | 62.7% | Ref. | ||
| Tiles | 102 | 36.6% | 1.68 (0.80, 3.54) | |||
| Others | 2 | 0.7% | Omitted | |||
| 4. Predominant floor material | Cement or tiles | 94 | 33.8% | Ref. | ||
| Dirt | 176 | 63.3% | 1.79 (0.80, 3.98) | |||
| Others | 8 | 2.9% | 1.09 (0.11, 10.5) | |||
| Peridomestic conditions | ||||||
| 5. Presence of rock fences | No | 245 | 87.5% | Ref. | ||
| Yes | 35 | 12.5% | 1.83 (0.68, 4.89) | |||
| 6. Presence of piled roofing tiles | No | 197 | 70.4% | Ref. | ||
| Yes | 83 | 29.6% | 2.80 (1.34, 5.85) | * | ||
| 7. Presence of piled firewood | No | 154 | 55.0% | Ref. | ||
| Yes | 126 | 45.0% | 1.36 (0.67, 2.78) | |||
| Domestic animals | ||||||
| 8. Presence of dogs | No | 76 | 27.1% | Ref. | ||
| Yes | 204 | 72.9% | 6.26 (1.80, 21.7) | * | ||
| 9. Presence of cats | No | 185 | 66.1% | Ref. | ||
| Yes | 95 | 33.9% | 1.90 (0.94, 3.84) | |||
| 10. Presence of pigs | No | 189 | 67.5% | Ref. | ||
| Yes | 91 | 32.5% | 1.88 (0.92, 3.84) | |||
| 11. Presence of chickens in henhouse | No | 220 | 78.6% | Ref. | ||
| Yes | 60 | 21.4% | 0.70 (0.28, 1.72) | |||
| 12. Presence of chickens without henhouse | No | 119 | 42.5% | Ref. | ||
| Yes | 161 | 57.5% | 1.72 (0.83, 3.56) | |||
| 13. Any animals sleeping inside the house | No | 233 | 84.1% | Ref. | ||
| Yes | 44 | 15.9% | 1.30 (0.53, 3.18) | |||
| 14. Reported presence of rats inside the house | No | 94 | 33.7% | Ref. | ||
| Yes | 185 | 66.3% | 1.24 (0.59, 2.62) | |||
| Residents' behavior | ||||||
| 15. Plaster walls more than once every 30 days | No | 257 | 92.5% | Ref. | ||
| Yes | 21 | 7.6% | 0.55 (0.17, 2.56) | |||
| 16. Spray more than once every 30 days | No | 199 | 71.1% | Ref. | ||
| Yes | 81 | 28.9% | 0.21 (0.07, 0.63) | * | ||
| Control variables | ||||||
| 18. Age of house construction in year | ≤ 10 | 76 | 27.1% | Ref. | ||
| > 10, ≤ 20 | 109 | 38.9% | 4.04 (1.32, 12.4) | * | ||
| > 20 | 95 | 33.9% | 3.96 (1.26, 12.5) | * | ||
| 19. Poverty score | 0 to 8.6 | 280 | 3.1 | 0.88 (0.72, 1.07) | ||
| Village-level variables† | ||||||
| 20. House infestation index at baseline (%) | 4.3 to 71.4 | 22 | 21.3 | 1.01 (0.99, 1.04) | ||
| 21. House infestation index at endline (%) | 0.0 to 25.0 | 22 | 7.6 | 0.98 (0.92, 1.05) | ||
| 22. Number of spray rounds | 1 to 3 | 22 | 2.3 | 1.12 (0.56, 2.21) | ||
Odds ratios are calculated by mixed-effects logistic regression using villages as a group variable
† Means are averages of the village-level values. Odds ratios are computed using houses as a unit of analysis.
* p-value < 0.05