Table 3 Logistic estimates for IAV-S positivity according to selected variables
From: Effect of herd size on subclinical infection of swine in Vietnam with influenza A viruses
Variable | P | Odds ratio | 95 % CI | |
|---|---|---|---|---|
Total number of pigs | <1000 | reference | ||
≧1000 | <0.001 | 25.54 | 7.42 to 87.98 | |
Type of operation | Not farrow-to-finish | reference | ||
Including farrow-to-finish | 0.85 | 0.89 | 0.24 to 3.24 | |
Type of pig house | Open-sided or semi-open-sided house | reference | ||
Windowless | 0.26 | 0.36 | 0.06 to 2.10 | |
Other animals on farm | No | reference | ||
Yes | 0.55 | 0.70 | 0.21 to 2.29 | |
Constant | <0.001 | 0.13 | ||