Table 2.

Prevalence ratio (PR) estimates of the association of Escherichia coli contamination of stored drinking water with water, sanitation, and hygiene practices in Pisco, Peru, 2014

	Unadjusted PR	(95% CI)	Adjusted PR*	(95% CI)
Improved primary water source	0.72	(0.44, 1.17)	0.79	(0.50, 1.24)
Primary water source
Unimproved source	1.00	–	1.00	–
Other improved source	0.96	(0.58, 1.59)	0.99	(0.62, 1.58)
Piped source on premises	0.57†	(0.34, 0.96)	0.61	(0.37, 1.03)
Storage container type
Wide-mouthed container	1.00	–	1.00	–
Teapot	0.51	(0.23, 1.13)	0.63	(0.28, 1.40)
Container covered	0.61†	(0.39, 0.94)	0.70	(0.46, 1.06)
Container cleanliness	0.56‡	(0.37, 0.83)	0.67†	(0.45, 1.00)
Water treatment	0.51§	(0.35, 0.72)	NC	–
Method of water extraction
Dipped with an object or hands	1.00	–	1.00	–
Poured or used a spigot	0.58§	(0.42, 0.80)	0.58§	(0.42, 0.80)
Toilet/latrine	0.96	(0.64, 1.43)	0.99	(0.66, 1.49)
Correct hand washing demonstration	0.53‡	(0.36, 0.78)	0.62†	(0.42, 0.90)

CI = confidence interval; NC = model does not converge on 200 iterations.

^*Models adjusted for the dipping of a cup/other utensil/hands.

Significance codes: †P < 0.05; ‡P < 0.01; §P < 0.001.