Table 5.
Factors associated with predicted calving rate in cattle herds in Northern Nigeria: results of a multiple linear regression model
| Risk factor and level | Coefficient | 95% CI | P - value |
|---|---|---|---|
| Brucella infection | |||
| No | 1 | - | - |
| Yes | -14.9 | -20.01, -9.62 | <0.001 |
| Campylobacter fetus infection | |||
| No | |||
| Yes | -8.41 | -12.93, -3.88 | <0.001 |
| State | |||
| Adamawa | 1 | - | - |
| Kaduna | 1.76 | -2.84, 6.35 | 0.452 |
| Kano | -0.24 | -5.40, 4.92 | 0.928 |
| Supplementary feeding | |||
| None | 1 | - | - |
| Fodder and bran | 6.54 | 0.46, 12.63 | 0.044 |
| Concentrate | 7.86 | 0.46, 15.30 | 0.037 |
| Mineral supplementation | |||
| No | 1 | ||
| Yes | 6.45 | 1.71, 11.20 | 0.008 |
| Isolation and observation of cow during parturition and removal of afterbirth | |||
| No | 1 | ||
| Yes | 7.54 | 3.09, 11.98 | 0.001 |
| Small ruminants | |||
| No | 1 | - | - |
| Yes | -7.81 | -12.41, -3.22 | 0.001 |
| Buy in new animals | |||
| Closed herd | 1 | - | - |
| Buy <3 + quarantine | -6.44 | -12.53, -0.38 | 0.038 |
| Buy >3 or no quarantine | -15.23 | -20.31, -10.16 | <0.001 |
| Presence of crush, chute or other form of restraint on the farm | |||
| No | 1 | - | - |
| Yes | -9.97 | -16.08, -3.76 | 0.002 |
| Herd size | |||
| ≤ 15 | 1 | - | |
| > 15 | 4.98 | 1.17, 8.80 | 0.011 |