Table 3.

Multinomial logistic regression showing associations between H. pylori infection and risk factors.

Variable	Std. Err	Z score	Odds Ratio	95% CI	P value
Sex	0.338	0.48	1.151	0.647 – 2.045	0.633
School attendance	1.987	2.72	3.948	1.470 – 10.601	0.006
Source of school drinking water	0.423	-0.13	0.944	0.393 – 2.270	0.898
Sanitary facility at school	0.678	1.05	1.574	0.676 – 3.664	0.293
Source of drinking water at home	0.193	-1.70	0.549	0.275 – 1.094	0.089
Sanitary facility at home	0.089	-3.76	0.228	0.106 – 0.492	<0.001
Family history of PUD	0.570	1.72	1.751	0.925 – 3.314	0.085
Family history of Ca Stomach	0.263	-0.87	0.731	0.361 – 1.481	0.386
Family size	0.872	2.84	2.597	1.344 – 5.016	0.04

Std. Err: standard error; CI: confidence interval; PUD: peptic ulcer disease; Ca stomach: cancer of the stomach.