Table 4. Associations between parasitic infections and risk factors in Champasack (random household effect included, n = 669).

Indicators	Crude OR (95%CI)	P-value	Adjusted OR (95% CI)	P-value
O. viverrini
Age group (in year)
< 5	1.00	- ---	1.00	- ---
6–15	5.64 (2.10–15.13)		3.99 (1.93–8.24)
16–30	19.49 (5.53–68.67)		17.5 (5.70–53.68)
31–55	19.93 (5.97–66.51)		12.30 (4.68–32.29)
>55	49.74 (8.00–309.04)	<0.001	13.96 (3.32–58.75)	<0.001
Ethnic groups
Not Laoloum	1.00		1.00	- ---
Laoloum	154.9 (81.20–295.70)	<0.001	303.45 (134.20–686.63)	<0.001
S. mekongi
Daily bathing in Mekhong River
No	1.00		1.00	- ---
Yes	19.50 (8.87–42.87)	<0.001	3.20 (1.84–5.83)	<0.001
Hookworm
Age group (in year)
< 5	1.00	- ---	1.00	- ---
6–15	2.32 (1.24–4.34)		2.21 (1.28–3.80)
16–30	2.51 (1.23–5.14)		2.22 (1.16–4.23)
31–55	2.39 (1.24–4.62)		2.10 (1.18–3.72)	0.011
>55	2.26 (1.01–5.50)	0.040	N.A.	N.S.
Ethnic groups
Not Laoloum	1.00	- ---	1.00	- ---
Laoloum	0.11 (0.05–0.23)	<0.001	0.12 (0.07–0.23)	<0.001
A. lumbricoides
Socio-economic status
Least poor	1.00	- ---	1.00	- ---
Less poor	0.35 (0.06–2.10)		N.A.
Poor	1.27 (0.26–6.11)		N.A.
Very poor	50.14 (10.39–241.97)		N.A.
Most poor	226.73 (41.64–434.43)	<0.001	3.53 (1.47–8.47)	0.010
Multiple infections ≥2 species
Report of eating any raw foodstuffs a week prior to  survey (e.g., meat, fish, and vegetables)
No	1.00		1.00	- ---
Yes	2.12 (1.15–3.90)	0.021	2.74 (1.44–5.20)	0.002

CI, confidence interval; N.S., not significant; N.A., not applicable; OR, odds ratio.