| Full data (n = 662 farms) | Following the removal of records (n = 348 farms) |  | ||||
---|---|---|---|---|---|---|---|
Farm-level predictors | ORa | s.e. ORb | p-value | ORa | s.e. ORb | p-value | % change |
L vs. S bird countd | 7.304 | 1.485 | <0.0001 | 5.588 | 1.369 | <0.0001 | 23.5 |
L vs. S house countd | 1.783 | 1.289 | 0.023 | 1.879 | 1.310 | 0.019 | 5.1 |
Indoors | 2.888 | 1.425 | 0.003 | 3.822 | 1.472 | 0.001 | 24.4 |
Free-range | 0.280 | 1.529 | 0.003 | 0.227 | 1.579 | 0.001 | 18.9 |
Housing other | 0.363 | 1.648 | 0.043 | 0.338 | 1.656 | 0.031 | 6.9 |
Partial housing | 0.890 | 1.991 | 0.866 | 0.592 | 2.254 | 0.518 | 33.5c |
Integrated | 0.544 | 1.232 | 0.003 | 0.554 | 1.319 | 0.033 | 1.8 |
East | 0.446 | 1.401 | 0.017 | 0.426 | 1.538 | 0.047 | 4.5 |
Scotland | 0.061 | 2.837 | 0.007 | 0.090 | 2.914 | 0.024 | 32.2c |
Wales | 0.090 | 1.722 | <0.0001 | 0.116 | 2.176 | 0.006 | 22.4 |
West | 0.047 | 1.477 | <0.0001 | 0.056 | 1.583 | <0.0001 | 16.1 |