Table 2.
Link between gridded landscape/population-based risk classification and observed West Nile virus RT-PCR positivity among mosquito pools in Cuyahoga County, 2002–2006
| Mosquito Pool WNV positivity: | |||
|---|---|---|---|
| Model Variable | Multiply-Adjusted Odds Ratio |
95% CI | P value |
| Calendar Month | |||
| May | Reference | -- | -- |
| June | 1.74 | 0.38,7.89 | NS |
| July | 16.4 | 3.96,68.1 | < 0.001 |
| August | 56.9 | 13.7,235 | < 0.001 |
| September | 16.4 | 3.74, 72 | < 0.001 |
| Year | |||
| 2002 | 4.2 | 2.9,6.1 | < 0.001 |
| 2004 | 0.69 | 0.46, 1.03 | NS |
| 2005 | 1.04 | 0.69, 1.6 | NS |
| 2006 | Reference | -- | -- |
| Grid Risk Category | |||
| Low | Reference | -- | -- |
| Medium | 1.53 | 1.08,2.2 | 0.02 |
| High | 1.67 | 1.18,2.4 | 0.004 |