Table 4.
Factors associated BoHV1 status of stock bulls, using logistic regression analysis. Independent variables including age of individual bulls, movements pre-sampling, herd of origin, and vasectomy
| Dependent variable | Independent variable | Odds ratio | Confidence interval (95 %) | P value | |
|---|---|---|---|---|---|
| BoHV-1 classification | Age of the bulls | ||||
| POSITIVE vs. NEGATIVE | 2 years vs. 1 year | 5.15 | 1.89 | 14.03 | 0.001 |
| 3 years vs. 1 year | 12.78 | 4.46 | 36.61 | 0 | |
| 4 years or older vs. 1 year | 28.94 | 9.35 | 89.5 | 0 | |
| Movement pre-sampling vs. no movement | 1.32 | 1.04 | 1.67 | 0.019 | |
| Purchased vs. Homebred | 3.08 | 1.51 | 6.29 | 0.002 | |
| Non vasectomized vs. vasectomizeda | 3.16 | 0.89 | 11.20 | 0.074 | |
aIncluded for the purposes of highlighting a trend