Risk factor and level | Coefficient | 95% CI | P - value |
---|---|---|---|
Brucella infection | Â | Â | Â |
 No | 1 | - | - |
 Yes | -14.9 | -20.01, -9.62 | <0.001 |
Campylobacter fetus infection | Â | Â | Â |
 No |  |  |  |
 Yes | -8.41 | -12.93, -3.88 | <0.001 |
State | Â | Â | Â |
 Adamawa | 1 | - | - |
 Kaduna | 1.76 | -2.84, 6.35 | 0.452 |
 Kano | -0.24 | -5.40, 4.92 | 0.928 |
Supplementary feeding | Â | Â | Â |
 None | 1 | - | - |
 Fodder and bran | 6.54 | 0.46, 12.63 | 0.044 |
 Concentrate | 7.86 | 0.46, 15.30 | 0.037 |
Mineral supplementation | Â | Â | Â |
 No | 1 |  |  |
 Yes | 6.45 | 1.71, 11.20 | 0.008 |
Isolation and observation of cow during parturition and removal of afterbirth | Â | Â | Â |
 No | 1 |  |  |
 Yes | 7.54 | 3.09, 11.98 | 0.001 |
Small ruminants | Â | Â | Â |
 No | 1 | - | - |
 Yes | -7.81 | -12.41, -3.22 | 0.001 |
Buy in new animals | Â | Â | Â |
 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 | Â | Â | Â |
 No | 1 | - | - |
 Yes | -9.97 | -16.08, -3.76 | 0.002 |
Herd size | Â | Â | Â |
 ≤ 15 | 1 | - |  |
 > 15 | 4.98 | 1.17, 8.80 | 0.011 |