A cross sectional study of the prevalence, risk factors and population attributable fractions for limb and body lesions in lactating sows on commercial farms in England

Table 10 Two level logistic regression models of the risks associated with body lesions in 249 lactating sows from 80 indoor farms in Britain

	Shoulders		Hips, spine or tail
Intercept coefficient	0.9		1.2
	OR	CI	OR	CI
Week of lactation	0.7	0.4, 1.0	1.0	0.7, 1.4
Body condition score	0.5	0.2, 1.3	0.5	0.2, 1.2
Floor/bedding
Solid with bedding
Partly slatted with bedding	0.9	0.1, 6.1	0.5	0.1, 3.2
Partly slatted no bedding	1.0	0.2, 5.6	1.3	0.3, 5.9
Fully slatted	1.7	0.2, 12.3	4.7	0.9, 25.0
Initial response to human presence¹
Bright alert and responsive
May be dull	3.4	1.3, 8.6*	1.0	0.4, 2.3
Dull and unresponsive	4.8	1.2, 19.6*	0.7	0.1, 4.0
Space between sow's tail and the crate
<10 cm
10-20 cm	0.5	0.1, 1.7	0.2	0.1, 0.6*
>20 cm	0.3	0.1, 0.9*	0.2	0.1, 0.7*
Wet slurry in the sow lying area
No
Yes	7.1	1.5, 34.1*
Cracked/broken floor in the sow lying area
No
Yes	4.7	1.1, 19.5*
Random effects	Var.	SE	Var.	SE
Variation between farms	0.5	0.6	0.6	0.6
Hosmer-Lemeshow goodness-of-fit	χ²	P value	χ²	P value
	1.7	0.92	6.4	0.27

¹[12]
*The CI does not include unity therefore the factor is significantly different from the reference category (p < 0.05)

ISSN: 1746-6148