Table 2

Summary of static variable testing, standardization, model ranking and weight calculations.
Variable
 Relation to ecology of WNV vector mosquitoes
 Mean for zip codes with
 T-test significance
 WNV risk level
 Variable






WNV bird occurrence
 no WNV bird occurrence
 (p-value)
 1 – low risk
10 – high risk
 Rank
 Weight
Road density
 Breeding sites along roads
 1.7568
 1.1550
 .001
 High rd. 10
Low rd. 1
 1
 0.4
Stream density
 Water as habitat
 1.1200
 1.1868
 .010
 High sd. 1
Low sd. 10
 2
 0.3
Slope percent
 Aspect of water outflow rate
 7.1416
 7.9886
 .028
 Gentle sl. 10 Steep sl. 1
 3
 0.2
NDVI vegetation
 Vegetation as resting and breeding sites
 164.6797
 160.9131
 .251
 High NDVI 10 Low NDVI 1
 4
 0.1

Cooke et al. International Journal of Health Geographics 2006 5:36   doi:10.1186/1476-072X-5-36

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