Table 2.
Multivariable results of mixed logistic regression model of bovine respiratory disease (BRD) prevalence after intranasal vaccination of non-weaned beef calves.
| Variable | Category | Number of calves evaluated | Odds ratio of BRD occurrence | 95% Confidence interval | Pa |
|---|---|---|---|---|---|
| Vaccine | Vaccine B | 467 | Reference | ||
| Vaccine A | 468 | 0.61 | 0.30–1.25 | 0.17 | |
| Duration of in-house risk period in days | (0–45) | 313 | Reference | ||
| (45–67.5) | 243 | 8.88 | 1.07–73.66 | 0.04 | |
| (67.5–90) | 379 | 6.61 | 0.86–50.99 | 0.07 |
a
For each variable, refers to level of significance between the category under consideration and the reference category.