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

From: 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

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