Table 2.
Univariate Cox regression analysis of factors associated with time to reinfection.
| Covariate | HR (95% CI) | p value |
|---|---|---|
| Stamping out | 0.2 (0.1–0.5) | <0.001 |
| Co-infection with M. bovis | 0.9 (0.4–2.1) | 0.9 |
| Buffalo density per municipalitiesa | 1 (0.9–1.1) | 0.2 |
| Buffalo number at the outbreak onset+ | 1.1 (1.1–1.2) | <0.001 |
a
Buffalo density: hazard ratio calculated per increase of 200 buffaloes/km2 at the municipal level. Buffalo number at outbreak onset: hazard ratio calculated per increase of 50 animals. HR: Hazard Ratio per specified increment.