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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.

From: Environmental and social determinants of human risk during a West Nile virus outbreak in the greater Chicago area, 2002

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