Table 6. Best Fit Final Model for Prevalence of Intestinal Infectious Disease in People Living in Homes with Private Water Supplies, England, 2008–2010.

Variable	Parameter	Relative Risk	95% Confidence Interval
Any Enterococci	No	1
	Yes	23.74	2.00–282.4
Log age		3.29	0.97–11.22
Any Enterococci * Log age		0.13	0.03–0.64
Sewage	Mains	1
	Onsite	3.32	1.42–7.74
Gender	Female	1
	Male	0.50	0.26–0.98
Quantity unboiled private supply water	/glass	0.87	0.78–0.97
Maximum education level in home	Secondary	1
	Post secondary	3.22	1.11–9.31