Table 3.
Univariable and multivariable logistic regression analysis of potential risk factors of brucellosis at herd level in breeding female cattle in study areas.
| Variables | Category | Total herds examined | Total herds positive (%) | Univariable | Multivariable | ||
|---|---|---|---|---|---|---|---|
| OR (CI 95%) | p-value | OR (CI 95%) | p-value | ||||
| Origin | Limu Seka | 81 | 11(13.6) | ||||
| Chora Boter | 57 | 5(8.8) | 1.6(0.54–4.99) | 0.388 | |||
| Agro-ecology | Mid-altitude | 115 | 15(13.04) | – | – | ||
| Lowland | 23 | 1(4.35) | 3.3(0.41–26.31) | 0.260 | |||
| Species composition | Single | 28 | 7(25.00) | – | – | – | – |
| Mixed | 110 | 9(8.18) | 3.7(1.25–11.17) | 0.018 | 3.7(1.25–11.17) | 0.018 | |
| Herd size | Small | 57 | 9(15.79) | – | – | ||
| Medium | 35 | 5(14.29) | 1.1(0.34–3.68) | 0.845 | |||
| Large | 46 | 2(4.35) | 4.1(0.85–20.47) | 0.080 | |||
| Management system | Semi-intensive | 96 | 13(13.54) | – | – | ||
| Extensive | 42 | 3(7.14) | 2.0(0.55–7.56) | 0.288 | |||
| Introduction of new animal | Yes | 66 | 8(12.12) | – | – | ||
| No | 72 | 8(11.11) | 1.1(0.39–3.13) | 0.853 | |||
OR: Odds Ratio; CI: Confidence Interval.