From: A case–control study regarding factors associated with digital dermatitis in Norwegian dairy herds
Variable | OR | 95% CI of OR | P value |
---|---|---|---|
Purchase of livestock during the last 5 years a | |||
0 animals | Baseline | ||
1–2 animals | 1.53 | 0.61–3.80 | 0.364 |
3–4 animals | 1.65 | 0.53–5.18 | 0.389 |
5–11 animals | 1.71 | 0.77–3.78 | 0.185 |
12–27 animals | 2.30 | 1.03–5.12 | 0.042 |
28–52 animals | 4.34 | 1.71–11.04 | 0.002 |
≥ 53 animals | 5.39 | 1.90–15.35 | 0.002 |
Missing | |||
Trimming frequency a | |||
1 < 2/year | Baseline | ||
< 1/year | 0.41 | 0.17–0.97 | 0.043 |
2 < 3/year | 1.58 | 0.87–2.85 | 0.130 |
≥ 3/year | 4.09 | 1.57–10.69 | 0.004 |
Certified prof trimmer trims ≥ 90% of cowsa | |||
No | Baseline | ||
Yes | 3.98 | 1.32–11.95 | 0.014 |
Cleaning of feet in chute before trimming | |||
No | Baseline | ||
Yes | 1.98 | 1.12–3.51 | 0.019 |
Uncertain | 0.82 | 0.31–2.14 | 0.678 |
Slatted flooring | |||
Yes | Baseline | ||
No | 2.36 | 1.30–4.26 | 0.005 |
Uncertain | 1.29 | 0.48–3.48 | 0.614 |
Random effect county (var): | 0.568 | 0.142–2.273 |