Table 9.
Significant results obtained from logistic regression of antimicrobial resistant Histophilus somni from dairy-type cattle upon feedlot arrival.
| Risk factor | Ampicillin | Oxytetracycline | Penicillin | Spectinomycin | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | p-value | OR | 95% CI | p-value | OR | 95% CI | p-value | OR | 95% CI | p-value | |
| Country | ||||||||||||
| CA | 1 | 1 | – | 1 | 1 | – | 1 | 1 | – | 1 | 1 | – |
| US | 18.4 | 3.7–92.1 | <0.001 | na | na | na | 23.22 | 3.6–148.9 | <0.001 | na | na | na |
CA, Canada; CI, confident interval; OR, odds ratio.
na, that variable was not significant at the p-value ≤ 0.1 level and was eliminated from the regression.
Bold p-values indicate statistically significant results at p ≤ 0.1.