Variables | Scrapie positive (n = 411) | Scrapie negative (n = 1644) | P-value (Mann-Whitney U test) | ||
---|---|---|---|---|---|
Median | IQR* | Median | IQR* | ||
Altitude (masl) | |||||
England | 140 | 124 | 140 | 136 | 0.41 |
Scotland | 86 | 128 | 137 | 151 | 0.006 |
Wales | 282 | 139 | 241 | 199 | 0.002 |
Flock size (no. sheep) | |||||
England | 312 | 452 | 61 | 196 | <0.001 |
Scotland | 330 | 479 | 98 | 315 | <0.001 |
Wales | 861 | 764 | 193 | 456 | <0.001 |
Farm area (ha) | |||||
England | 78.8 | 105.6 | 22.4 | 77.6 | <0.001 |
Scotland | 129 | 224.4 | 36.5 | 152.7 | 0.001 |
Wales | 117.5 | 101.43 | 42.5 | 81.9 | <0.001 |
Density (sheep/ha) | |||||
England | 4.2 | 5.5 | 2.9 | 4.8 | <0.001 |
Scotland | 2.7 | 3.7 | 2.6 | 4.7 | 0.637 |
Wales | 7 | 3.7 | 5.2 | 4.6 | <0.001 |
Mean temperature 2002 - 2005 (°C) | |||||
England | 10 | 1.32 | 10.1 | 1.06 | 0.306 |
Scotland | 8.7 | 0.55 | 8.8 | 1.01 | 0.544 |
Wales | 9.5 | 1.18 | 9.8 | 1.23 | 0.014 |
Mean rainfall 2002 - 2005 (mm) | |||||
England | 73.4 | 37.6 | 69.6 | 31.2 | 0.204 |
Scotland | 82 | 19.59 | 98.7 | 39.4 | <0.001 |
Wales | 112.1 | 46.72 | 103.9 | 35 | 0.006 |