Table 2. Yearly association between West Nile Virus (WNV) incidence and socio-economic status at county level in Alabama.
The association was estimated using regression model adjusted by land use, rainfall, flooding events, and population density. No WNV cases were reported during the year 2009 in Alabama.
| Year | Socio-economic status | VIF |
|---|---|---|
| 2007 | Positive association | 2.3 |
| 2008 | Negative association** | 2.6 |
| 2010 | - | |
| 2011 | - | |
| 2012 | Positive association* | 2.8 |
| 2013 | - | |
| 2014 | - | |
| 2015 | - | |
| 2016 | Positive association** | 2.7 |
| 2017 | Positive association** | 2.3 |
- model power <0.8
*p<0.05
**p<0.01