Table 2 Distribution of potential confounding factors across intervention and matched comparison areas.
Area and zones | Dairy herds % | Badger density/km2 | Number of badgers removed historically | Flood zone category 3 % | Motorway total length/km | Urban area % | Number of farms | >1 land parcel in area % | All land inside area % | All land inside central or buffer zones % | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1972–1989 | 1990–1998 | 1999–2006 | ||||||||||
Gloucestershire | ||||||||||||
Intervention central | 17.7 | 5.1 | 52 | 366 | 62 | 16.2 | 0 | 0 | 215 | 83.3 | 66.0 | 71.6 |
Comparison central (n = 9) | 15.9 | 5.5 | 194.1 | 94.7 | 25.1 | 7.0 | 4.6 | 5.6 | 158.4 | 76.5 | 51.6 | 67.5 |
Intervention buffer | 22.3 | 4.9 | 21 | 43 | 49 | 16.6 | 25.9 | 11.5 | 92 | 62.8 | 22.3 | 37.2 |
Comparison buffer (n = 9) | 15.7 | 5.4 | 97.9 | 66.4 | 62.8 | 8.8 | 5.9 | 5.3 | 82.9 | 74.9 | 26.9 | 49.0 |
Somerset | ||||||||||||
Intervention central | 8.4 | 5.0 | 0 | 375 | 230 | 2.9 | 0 | 0 | 153 | 81.2 | 63.6 | 81.2 |
Comparison central (n = 9) | 18.9 | 5.4 | 171.3 | 105.8 | 3.6 | 7.0 | 3.9 | 3.1 | 160.9 | 77.9 | 54.8 | 68.0 |
Intervention buffer | 3.4 | 5.1 | 0 | 87 | 102 | 3.4 | 0 | 0 | 87 | 73.9 | 36.4 | 53.4 |
Comparison buffer (n = 9) | 21.2 | 5.5 | 35.1 | 53.4 | 18.2 | 8.1 | 1.4 | 4.4 | 83.7 | 75.0 | 25.9 | 47.7 |
Dorset | ||||||||||||
Intervention central | 50.3 | 9.7 | 5 | 0 | 0 | 9.0 | 0 | 0.9 | 156 | 79.0 | 61.8 | 72.0 |
Comparison central (n = 8) | 33.9 | 7.1 | 71.3 | 65.3 | 4.5 | 12.5 | 6.1 | 2.1 | 127.8 | 79.0 | 51.1 | 64.3 |
Intervention buffer | 36.3 | 9.8 | 0 | 8 | 0 | 6.4 | 0 | 5.4 | 112 | 68.1 | 23.0 | 41.6 |
Comparison buffer (n = 8) | 26.9 | 7.3 | 41.3 | 43.1 | 2.6 | 9.1 | 1.3 | 4.7 | 74.5 | 67.3 | 18.6 | 36.3 |
