Research Article
Prevalence of Lameness in Dairy Cows and Associated Risk Factors at Hawassa Town Dairy Farms, Ethiopia
Table 3
Univariable logistic regression analysis of risk factors for the occurrence of lameness in Hawassa city dairy farms.
| Risk factors | Level of factors | Number of animals visited | Number of positive animals (%) | Std. err. | COR | 95% CI | value |
| Milking status | Nonmilking | 275 | 9 (3.3%) | — | — | — | — | Milking | 165 | 36 (21.8%) | 0.388 | 0.121 | 0.057–0.259 | <0.001 |
| Exercise | Allow to exercise | 249 | 22 (8.8%) | — | — | — | — | Not allowed to exercise | 191 | 23 (12%) | 0.315 | 1.413 | 0.762–2.620 | 0.273 |
| Age | <2 years | 163 | 1 (0.6%) | — | — | — | — | >2 years | 277 | 44 (15.9%) | 1.016 | 0.033 | 0.004–0.240 | 0.001 |
| Parity | None | 233 | 1 (0.4%) | — | — | — | — | One | 31 | 7 (22.6%) | 1.019 | 61.755 | 8.380–455.114 | <0.001 | ≥2 | 176 | 37 (21%) | 0.468 | 0.913 | 0.365–2.282 | 0.845 |
| Milk yield | None | 275 | 9 (3.3%) | — | — | — | — | 4 litre | 43 | 5 (11.6%) | 0.584 | 0.257 | 0.082–0.808 | 0.020 | 4–8 litre | 78 | 14 (17.9%) | 0.449 | 0.155 | 0.64−0.373 | <0.001 | 8–16 litre | 35 | 13 (37.1%) | 0.487 | 0.057 | 0.022–0.149 | <0.001 | >16 litre | 9 | 4 (44.4%) | 0.752 | 0.042 | 0.010–0.185 | <0.001 |
| Lactation stage | Nonlactating | 275 | 9 (3.3%) | — | — | — | — | <2 months | 43 | 7 (16.3%) | 0.534 | 0.174 | 0.061–0.496 | 0.001 | 2–6 months | 54 | 16 (29.6%) | 0.451 | 0.80 | 0.033–0.195 | <0.001 | 6–9 months | 35 | 6 (17.1%) | 0.562 | 0.164 | 0.054–0.492 | 0.001 | >9 months | 33 | 7 (21.2%) | 0.544 | 0.126 | 0.043–0.365 | <0.001 |
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