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Table 1 Environmental factors remained after Discriminant Analysis.

From: Spatio-temporal analysis of the relationship between WNV dissemination and environmental variables in Indianapolis, USA

Year Variable Classification function coefficient Eigenvalue BG with WNV/BG without WNV Grouping accuracy
2002 Percentage of agriculture 0.143 0.226 46/612 86.90%
  Total length of streams 0.001    
  Total size of wetlands 0.001    
  Constant -2.124    
2003 Percentage of agriculture 0.126 0.202 35/623 84.80%
  Total length of streams 0.001    
  Constant -1.336    
2004 Percentage of agriculture 0.154 0.201 25/633 84.80%
  Percentage of water 0.037    
  Mean slope 1.908    
  DEM variation 0.049    
  Constant -4.261    
2005 Percentage of agriculture 0.232 0.24 36/622 90.30%
  Total size of wetlands 0.001    
  Constant -2.499    
2006 Total size of wetlands 0.001 0.157 29/629 85.30%
  Human population density 0.001    
  Constant -2.141    
2007 Percentage of agriculture 0.051 0.195 16/642 88.90%
  Total length of streams 0.001    
  Percentage of water 0.205    
  Distance to the closest pollutant 0.001    
  Distance to the closest waste industry 0.003    
  Constant -4.709    
  1. Their coefficients, eigenvalue, the numbers of census blockgroups with mosquito WNV cases and without WNV cases, and grouping accuracies.