Table 2.
GEE model regressing H5N1 infection in the importing country on H5N1 infection in the exporting country, thousands of chickens traded, and their interaction. Errors clustered on import country. N = 365,418, QIC = 195,618.3, Null QIC = 206,928.9
| Effect | OR | 95% CI | p-value |
|---|---|---|---|
| Log (chicken) × H5N1 in export country | 1.22 | 1.08, 1.39 | 0.0013 |
| Log (chicken) | 1.13 | 0.98, 1.30 | 0.093 |
| H5N1 in export country | 0.93 | 0.92, 1.06 | <0.0001 |
| Year | |||
| 2003 | 0.13 | 0.03, 0.54 | 0.0051 |
| 2004 | 0.63 | 0.34, 1.15 | 0.13 |
| 2005 | 0.63 | 0.29, 1.34 | 0.23 |
| 2006 | 3.03 | 1.82, 5.05 | <0.0001 |
| 2007 | 2.25 | 1.35, 3.74 | 0.0018 |
| 2008 | 1.65 | 1.04, 2.59 | 0.032 |
| 2009 | 0.70 | 0.45, 1.07 | 0.101 |
| 2010 | 1.08 | 0.78, 1.49 | 0.65 |
| 2011 | – | – | – |