Table 6.

Multivariate robust Poisson regression analysis of total coliforms in household water.

Variable	aPR	95% CI	p value
Age (years)
21–30	1.0	—	—
31–40	1.49	0.74–2.99	0.26
41–50	1.27	0.59–2.72	0.54
51–60	1.73	0.70–4.23	0.23
≥61	3.50	1.48–8.25	0.004
Education
Primary	1.0	—	—
Secondary	1.20	0.74–1.95	0.46
Tertiary	0.13	0.35–0.44	0.001
Occupation
Peasant	1.0	—	—
Trader	1.53	0.91–2.59	0.11
Civil servant	4.62	1.01–21.13	0.048
NGO	0.064	0.005–0.27	<0.001
Water storage container
Closed jerrican	1.0	—	—
Open jerrican	1.77	0.65–4.80	0.26
Jar	3.72	1.55–8.95	0.003
Closed bottle	3.25	1.35–7.79	0.008
Method of water treatment
Boiling	1.0	—	—
SODIS	2.67	1.36–5.22	0.004
Water guard	1.30	2.56–6.66	<0.001
Days of water storage
One day	1.0	—	—
Two days	0.36	0.11–1.15	0.09
Three days	0.95	0.31–2.91	0.93
Four days	1.08	0.26–4.32	0.92