Table 2

DA results for tracts with at least one human case of WNV compared to the tracts without cases. The five variables are significant at the .001 level using the Wilks' Lambda test to enter the variable in the model. The Eigenvalue is .160 and the Canonical Correlation is .372 for this model.

Variable
Standardized Discriminant Function Coefficient
Mean for tracts





No WNV cases
> 0 WNV cases

Bird distance
-.474
2149 m
1426 m
Housing from 1950–1959
.443
16%
23%
Race as % white
.443
50%
67%
Housing unit per Km2
-.291
2.24 units/km2
1.38 units/km2
Median Age
.246
32.9 yrs
36.1 yrs

Ruiz et al. International Journal of Health Geographics 2004 3:8   doi:10.1186/1476-072X-3-8