Volume 10, Number 6—June 2004
Dispatch
Antibody Prevalence of West Nile Virus in Birds, Illinois, 2002
Table 2
Logistic regression analysis of Illinois avian WNV antibody prevalence, 2002a
Factor | DF | Wald χ2 | p value |
---|---|---|---|
Region |
2 |
17.65 |
< 0.0001 |
Month |
10 |
44.80 |
< 0.0001 |
Habitat (urban/natural) |
1 |
1.29 |
0.26 |
Full model |
13 |
78.21 |
< 0.0001 |
r2 = 0.14 |
aWNV, West Nile virus; DF, degrees of freedom.
bDependent variable, presence or absence of WNV antibody.
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