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Table 6 Estimates from a Cox proportional hazards model exploring the hazard of developing post-weaning diarrhea

From: Post-weaning diarrhea in pigs weaned without medicinal zinc: risk factors, pathogen dynamics, and association to growth rate

  Hazard ratio Std. err p value 95% conf. interval
Birth weight
 Normal–high (1110–2080 g) 1.00 (Base)    
 Low (540–1100 g) 2.30 0.57 0.001 1.41 3.74
Time of weaning
 Weaned at day of insertion to nursery 1.00 (Base)    
 Weaned in the farrowing unit, 0–7 days post insertion 0.11 0.06 2.3e−5 0.04 0.30
 Weaned in the farrowing unit, 8–13 days post insertion 0.84 0.26 0.569 0.46 1.53
Dam parity 0.88 0.05 0.041 0.78 0.99
Pen in the nursery (producer, mean body weight at insertion)
 1 (A, 8.1 kg) 1.00 (base)    
 2 (A, 6.5 kg) 0.53 0.24 0.153 0.22 1.27
 3 (A, 4.2 kg) 0.16 0.08 3.5e−4 0.06 0.44
 4 (A, 5.5 kg) 0.61 0.23 0.196 0.28 1.29
 5 (B, 4.8 kg) 0.82 0.31 0.605 0.39 1.73
 6 (B, 6.5 kg) 0.62 0.23 0.199 0.30 1.29
 7 (B, 6.5 kg) 0.82 0.32 0.607 0.39 1.74
 8 (B, 8.4 kg) 1.18 0.42 0.652 0.58 2.39
  1. Piglets (n = 251) were followed during first 14 days after insertion in two nursery units at commercial Danish indoor producers