Determinants | Category | Coefficient | Standard Error | Odds ratio (OR | 95% CI | P value |
---|---|---|---|---|---|---|
Age (median = 1.5 years) | > 1.5 | 1.72 | 0.76 | 5.56 | (1.39, 29.38) | 0.02* |
 | ≤1.5 |  |  |  |  |  |
Herd size (median = 100) | > 100 | 1.56 | 0.70 | 4.74 | (1.23, 20.32) | 0.03* |
 | ≤100 |  |  |  |  |  |