Volume 11, Number 9—September 2005
Research
Dead Crow Density and West Nile Virus Monitoring, New York
Millicent Eidson*
, Kate Schmit*, Yoichiro Hagiwara*, Madhu Anand*, P. Bryon Backenson*, Ivan Gotham*, and Laura Kramer*
, Kate Schmit*, Yoichiro Hagiwara*, Madhu Anand*, P. Bryon Backenson*, Ivan Gotham*, and Laura Kramer*
Table 1
Example of 2×2 table constructed for chi-square analyses in this study*
| Week 35, 2003 | Counties with DCD >0.1 in past 2 wks | Counties with DCD <0.1 in past 2 wks |
|---|---|---|
| No. cases with disease onset during week | 8 | 1 |
| Total population | 4,422,461 | 6,545,718 |
*Data for each week with human West Nile virus disease cases in 2001–2003 were pooled to calculate risk for disease occurring within 2 weeks of elevated dead crow density (DCD) in county relative to risk in counties without elevated DCD in the past 2 weeks.
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