Table 7.
Univariate case-case comparisons of demographic risk factors between confirmed positive RHT herds, unconfirmed positive RHT herds, and unconfirmed inconclusive RHT herds
| |
Confirmed positive RHT to Unconfirmed positive RHT |
Confirmed positive RHT to Unconfirmed inconclusive RHT |
Unconfirmed positive RHT to Unconfirmed inconclusive RHT |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Variable | OR | 95% CI | p-value | OR | 95% CI | p-value | OR | 95% CI | p-value |
| log10 (Number of cattle tested) |
1.52 |
0.76 – 3.13 |
0.247 |
2.24 |
1.19 – 4.31 |
0.014 |
1.36 |
0.88 – 2.12 |
0.170 |
| log10 (Number of cattle present) |
1.70 |
0.82 – 3.73 |
0.170 |
2.48 |
1.34 – 4.76 |
0.005 |
1.46 |
0.96 – 2.27 |
0.082 |
| % of herd imported from high incidence regions |
1.09 |
1.01 – 1.19 |
0.040 |
1.04 |
0.99 – 1.06 |
0.067 |
0.98 |
0.93 – 1.02 |
0.482 |
| log10 (Number of cattle moved onto farm) |
1.04 |
0.66 – 1.63 |
0.874 |
1.26 |
0.86 – 1.83 |
0.226 |
1.22 |
0.93 – 1.61 |
0.154 |
| log10 (Number of farms within 5 km radius) |
0.29 |
0.09 – 0.87 |
0.029 |
1.01 |
0.51 – 2.19 |
0.987 |
2.61 |
1.39 – 5.24 |
0.005 |
| Neighbouring herd with: |
|
|
|
|
|
|
|
|
|
| confirmed positive RHT |
0.70 |
0.33 – 1.40 |
0.323 |
0.98 |
0.51 – 1.80 |
0.970 |
1.42 |
0.92 – 2.14 |
0.105 |
| unconfirmed positive RHT |
1.11 |
0.56 – 2.16 |
0.764 |
1.34 |
0.75 – 2.34 |
0.309 |
1.21 |
0.79 – 1.83 |
0.371 |
| unconfirmed inconclusive RHT |
0.98 |
0.25 – 0.96 |
0.955 |
1.15 |
0.63 – 2.27 |
0.660 |
1.18 |
0.75 – 1.91 |
0.488 |
| Northing coordinate (100 km units) |
0.70 |
0.51 – 0.95 |
0.025 |
0.73 |
0.57 – 0.93 |
0.014 |
0.99 |
0.84 – 1.17 |
0.924 |
| Easting coordinate (100 km units) |
0.61 |
0.37 – 0.97 |
0.041 |
0.71 |
0.49 – 1.02 |
0.064 |
1.08 |
0.82 – 1.43 |
0.579 |
| Herd production type: |
|
|
|
|
|
|
|
|
|
| Beef |
Ref |
- |
- |
Ref |
- |
- |
Ref |
- |
- |
| Beef fattening |
- |
- |
- |
- |
- |
- |
- |
- |
- |
| Beef suckler |
1.15 |
0.56 – 2.37 |
0.703 |
1.36 |
0.73 – 2.53 |
0.331 |
1.18 |
0.76 – 1.82 |
0.457 |
| Dairy |
1.32 |
0.57 – 3.03 |
0.501 |
1.96 |
0.96 – 3.93 |
0.059 |
1.48 |
0.86 – 2.47 |
0.142 |
| Mixed |
- |
- |
- |
- |
- |
- |
- |
- |
- |
| log10 (Average number of sheep per year) |
0.93 |
0.74 – 1.16 |
0.498 |
0.96 |
0.79 – 1.16 |
0.628 |
1.03 |
0.90 – 1.19 |
0.650 |
| log10 (Average number of poultry per year) | 0.90 | 0.32 – 2.24 | 0.827 | 0.72 | 0.31 – 1.34 | 0.369 | 0.78 | 0.45 – 1.21 | 0.316 |
The analysis included all Scottish cattle herds that were subject to RHT from 2002 to 2009.