| Factor | Regression coefficient | SE | Odds Ratio (OR) | 95% C.I. | |
| Lower | Upper | ||||
| Constant | −6.031 | 0.609 | --- | --- | --- |
| Calf with mother | 2.607 | 0.500 | 27.2 | 5.1 | 36 |
| Calf flooring | −1.986 | 0.461 | 0.1 | 0.1 | 0.3 |
| Calving area | 1.951 | 0.460 | 7 | 2.9 | 17.3 |