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

Table 3

Comparison of environmental characteristic of index case houses.

Factor	Index case group		𝑃 value
	With secondary cases (group 1) (%)	Without secondary cases (group 2) (%)
House type			0.36
Terraced	14 (70.0)	70 (58.3)
Townhouse	0 (0.0)	4 (3.3)
Single house	3 (15.0)	22 (18.3)
Slum house	3 (15.0)	20 (16.7)
Apartment	0 (0.0)	4 (3.3)
Construction material			0.05
Concrete only	7 (35.0)	68 (56.7)
Concrete and wood	7 (35.0)	33 (27.5)
Wood only	3 (15.0)	13 (10.8)
Corrugated iron sheet	3 (15.0)	6 (5.0)
Window screens present			0.005
No	17 (85.0)	63 (52.5)
Yes	3 (15.0)	57 (47.5)
Garbage piles around house			0.71
No	18 (90.0)	111 (92.5)
Yes	2 (10.0)	9 (7.5)
Piped water
No	3 (15.0)	13 (10.8)	0.59
Yes (noncontinuous flow)	2 (10.0)	11 (9.2)
Yes (continuous flow)	15 (75.0)	96 (80.0)