Effectiveness of Space Spraying on the Transmission of Dengue/Dengue Hemorrhagic Fever (DF/DHF) in an Urban Area of Southern Thailand

Table 6

Multivariate analysis of factors affecting incidence of secondary DF/DHF.

Variables	Crude IDR (95% CI)	Adj. IDR (95% CI)	𝑃-value
Age of index case (years)	0.9 (0.8–1)	0.9 (0.8–1)	0.10
Male gender	2.2 (0.9–5.5)	2.7 (1–7.2)	0.04
House construction: ref. = Concrete
Mixed concrete and wood	2.4 (0.6–5)	1.7 (0.6–5.4)	0.30
Wood	1.8 (0.5–7)	0.8 (0.2–3.4)	0.74
Corrugated iron sheets	5.0 (1.3–19.5)	4.0 (1.0–16.8)	0.05
No window screens	0.4 (0.1–1.2)	0.5 (0.1–1.8)	0.30
Time lag of spraying (hours)	1.0 (0.8–1.2)	1.0 (0.8–1.3)	0.90
Area of spraying (m^2)	1.0 (1.0-1.0)	1.0 (1.0-1.0)	0.68