Risk factors | Class | Univariate | Multivariable | ||
---|---|---|---|---|---|
Crude OR (95% CI) | P | Adjusted OR (95% CI) | P | ||
Euclidean distance in km |  | 1.009 (1.005, 1.01) | < 0.001 | 1.007 (1, 1.01) | 0.002 |
Batch size (number of animals) | ≤1 | – | – | – | – |
2–4 | 2.6 (1.2, 5.7) | < 0.001 | 2.7 (1.3, 6) | 0.012 | |
≥5 | 14.6 (7.2, 31) | < 0.001 | 12 (5.8, 26.5) | < 0.001 |