Table 5 Three-level analyses to identify determinants for recent dengue infection in Mae Hia, northern Thailand.

ICC individuals

<0.0001

ICC households

<0.0001

Time (survey)

May 2002

6.9

1.0

September 2002

26.7

4.76

3.28–6.91

May 2003

1.4

0.18

0.08–0.39

September 2003

2.7

0.31

0.16–0.57

Individual-level variables:

Using abate

No

5.8

1.0

Yes

9.7

1.42

0.99–2.02

Bitten during day time

Never

7.2

1.0

Sometimes

8.9

1.25

0.88–1.78

Often

8.6

1.71

0.90–3.26

Household-level variables:

Housing

Wood or bamboo

7.6

1.0

Stone

7.8

1.27

0.79–2.04

Combination of stone, wood/bamboo

10.3

1.90

1.16–3.10

Distance to orchards

0–150 m

9.6

1.0

151–300 m

8.8

0.72

0.49–1.04

>300 m

7.1

0.47

0.28–0.79

Distance to water bodies

0–500 m

5.9

1.0

500–1300 m

8.3

2.26

1.32–3.87

>1300 m

10.5

2.66

1.49–4.75

% bare soils in 200 m

0%

9.8

1.0

1%

7.8

0.74

0.49–1.11

>1%

7.3

0.55

0.38–0.79

% village area with vegetation in 200 m

0–2%

8.4

1.0

3–8%

8.3

0.73

0.49–1.10

>8%

8.7

0.54

0.68–0.79