Table 4.

Results of the final logistic regression model for the serological status of West Nile virus in equids in Southern France, 2007–2008.

Variable	Adjusted Odds-ratio	95% Confidence interval	p-value
Horse birth date:
≤1990	1
[1991–1997]	0.65	0.36–1.17	0.147
[1998–2004]	0.97	0.49–1.91	0.921
≤2005	0.09	0.01–0.93	0.043
Date of horse acquisition:
≤1999	1
[2000–2004]	0.50	0.28–0.87	0.014
≥2005	0.27	0.12–0.62	0.002
Differences in mean % of open water area	(2 km buffers)
NOT-END
[−3.70; 0.01]	1
[0.01; 0.14]	1.78	0.62–5.13	0.285
[0.14; 3.88]	2.33	1.03–5.28	0.042
END-EPI
[−1.03; 0.0]	1
[0.0; 0.88]	1.10	0.33–3.61	0.878
[0.88; 8.01]	5.53	1.53–20.01	0.009