Table 4.

Multivariate model with drinking water and travel to another country

EXPOSURE	ALL CONTROLS			NEIGHBORHOOD CONTROLS
	Odds Ratio	95% CI	P-value	Odds Ratio	95% CI	P-value
Drinking water
Boil water	1.00			1.00
Filter or bottled	2.29	0.21, 60.6	0.589	2.11	0.08, 54.7	0.652
Tap watera	3.56	0.11, 46.5	0.381	2.91	0.15, 54.9	0.477
Travel to another country	34.7	3.58, 327	0.002	24.1	2.64, 220	0.005

^aWithout further treatment or processing