Table 5.
Univariate analysis of factors affecting incidence of secondary DF/DHF.
| Variable | IDR | 95% CI | P value |
|---|---|---|---|
| Male gender | 2.21 | 0.88–5.54 | 0.08 |
| Age of index case (years) | 0.90 | 0.80–1.00 | 0.04 |
| House type: ref. = single house | |||
| Terraced | 1.90 | 0.50–6.60 | 0.3 |
| Slum house | 2.30 | 0.50–11.4 | 0.3 |
| House material: ref. = concrete | |||
| Mixed concrete and wood | 2.37 | 0.83–6.77 | 0.1 |
| Wood | 1.81 | 0.47–7.00 | 0.39 |
| Corrugate iron sheet | 5.04 | 1.30–19.5 | 0.02 |
| Window screen (no versus yes) | 4.10 | 1.20–14.1 | 0.01 |
| Pipe water: ref. = continuous flowing | |||
| None | 1.40 | 0.40–4.70 | 0.62 |
| Noncontinuous flowing | 1.00 | 0.20–4.20 | 0.97 |
| Garbage pile near the house | 1.60 | 0.40–7.10 | 0.53 |
| House index | 1.01 | 0.99–1.03 | 0.11 |
| Container index | 1.00 | 0.99–1.03 | 0.42 |
| Time lag of spraying (hours) | 0.99 | 1.00-1.01 | 0.51 |
| Area of spraying (m2) | 1.00 | 1.00-1.00 | 0.45 |