Table 6 Two level logistic binomial models of the risks associated with foot lesions and swollen joints and claws in preweaning piglets from 98 British farms
All pens | Sole bruise 286 litters | Sole erosion 278 litters | Swollen joint/claw 284 litters | |||
|---|---|---|---|---|---|---|
Intercept coefficient | 2.2 | -2.0 | -3.8 | |||
OR | CI | OR | CI | OR | CI | |
Age | 0.3 | 0.3, 0.4 | 1.0 | 0.9, 1.2 | 1.1 | 0.9, 1.3 |
Floor/bedding | ||||||
Solid with bedding | ||||||
Partly slatted with bedding | 2.2 | 1.1, 4.6 | 1.3 | 0.5, 3.0 | 1.4 | 0.6, 3.5 |
Partly slatted with bedding in some areas | 4.2 | 2.0, 9.0 | 2.9 | 1.2, 7.1 | 2.5 | 1.1, 6.1 |
Partly slatted no bedding | 2.6 | 1.3, 5.0 | 2.4 | 1.1, 5.5 | 1.7 | 0.7, 3.9 |
Fully slatted | 3.0 | 1.4, 6.5 | 1.3 | 0.5, 3.3 | 3.0 | 1.2, 7.4 |
Wet sow lying area | ||||||
No | ||||||
Yes | 0.5 | 0.3, 0.9 | ||||
Worn sow dunging area | ||||||
No | ||||||
Yes | 2.8 | 1.3, 6.0 | ||||
Random effects | Var. | SE | Var. | SE | Var. | SE |
Farms | 0.5 | 0.2 | 1.1 | 0.3 | 0.3 | 0.2 |
Pens | 1.0 | 0.2 | 0.8 | 0.2 | 0.6 | 0.3 |
Hosmer-Lemeshow goodness-of-fit | χ 2 | P value | χ 2 | P value | χ 2 | P value |
0.5 | 0.78 | 6.2 | 0.10 | 3.8 | 0.20 | |