Table 6.
Univariate Logistic Regression of farm and individual-animal-level risk factors associated with the infection by M. bovis in 832 animals (106 cattle and 45 buffalo) in 39 herds in Amazonas State.
| Risk factor | Description | b | SE(b) | P-value | OR | 95% CI |
|---|---|---|---|---|---|---|
| Buffalo and cattle | Yes | 0.96 | 0.45 | 0.03 | 2.63 | 1.07–6.45 |
| No | 0 | |||||
| Farming | Extensive | 1.01 | 0.37 | 0.006 | 2.76 | 1.33–5.71 |
| Semi-confined | 0 | |||||
| Habitat | Floodplains | 1.20 | 0.37 | 0.001 | 3.35 | 1.59–7.03 |
| Mainland | 0 | |||||
| Herd age | ≥25 months | 0.99 | 0.50 | 0.04 | 2.71 | 1.007–7.31 |
| <25 months | 0 | |||||
| Herd health | Yes | 1.98 | 0.56 | 0.0004 | 7.24 | 2.40–21.80 |
| No | 0 | |||||
| Herd size | Large | 0.84 | 0.44 | 0.05 | 2.33 | 0.98–5.54 |
| Medium | 0.44 | 0.43 | 0.96 | 1.55 | 0.65–3.68 | |
| Small | 0 | |||||
| History | Yes | 1.41 | 0.49 | 0.004 | 4.13 | 1.554–11.013 |
| No | ||||||
| Purpose | Dairy | 1.51 | 0.53 | 0.004 | 4.54 | 1.59–12.96 |
| Mix | 0.66 | 0.45 | 0.14 | 1.93 | 0.79–4.68 | |
| Beef | 0 | |||||
| Specie | Buffalo | 1.06 | 0.20 | 0.001 | 8.40 | 3.73–18.89 |
| Cattle | 0 |