Table 1 |
|||||
|
Environmental factors remained after Discriminant Analysis. |
|||||
| 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 |
||||
|
|
|||||
|
Their coefficients, eigenvalue, the numbers of census blockgroups with mosquito WNV cases and without WNV cases, and grouping accuracies. |
|||||
|
Liu et al. International Journal of Health Geographics 2008 7:66 doi:10.1186/1476-072X-7-66 |
|||||
