Table 1.

Multivariate logistic model of the presence of anti-WNV seropositive animals in Iranian stables, 2008–2009

Variable		Odds-ratio (95% CI)	p
Type of stable (village of club)		NS2	0.07
Annual mean temperature	Δ=5°C	2.03 (1.10–3.92)	0.03
Annual mean %humidity1	<38%	Reference
	38–46%	NS	0.12
	46–52%	NS	0.27
	>52%	NS	0.34
Annual mean precipitation1	<154 mm	Reference
	154–247 mm	NS	0.84
	247–327 mm	NS	0.67
	>327 mm	NS	0.71
Distance to the nearest wetland area	Δ=10 km	0.73 (0.54–0.99)	0.05
Annual mean NDVI		NS	0.77
Seasonal NDVI differences	Δspring-summer>0	2.37 (1.07–5.41)	0.04
	Δsummer-autumn>0	NS	0.96
	Δautumn-winter>0	NS	0.38
	Δwinter-spring>0	NS	0.92
Local NDVI differences	spring>0	4.26 (1.07–17.98)	0.04
	summer>0	NS	0.11
	autumn>0	NS	0.35
	winter>0	NS	0.23

¹Classes bounds based on distribution quantiles

²NS= Non-significant