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Table 4 Results of the generalized linear mixed-effects model for the nursery period with dichotomized pen-week (at least one pig with score ≥1 vs. no pig with score ≥1) as outcome variable and pen nested in batch as random effect (random intercept): results of models for each individual explanatory variable, the full model and the final model

From: Provision of straw by a foraging tower –effect on tail biting in weaners and fattening pigs

Nursery Individual models Full model Final modela
Fixed effect Estimate P-value Estimate P-value Estimate P-value
Week −0.077 0.045 −0.040 0.679 −0.059 0.529
SG (CG = baseline) 0.331 0.590 0.330 0.539   
day/night temperature range 0.204 0.063 0.150 0.223   
average temperature −0.167 0.245 model did not converge with this variable included model did not converge with this variable included
ammonia concentration −0.024 0.521 −0.065 0.112   
air velocity 27.265 0.024 26.233 0.055 27.265 0.024
  1. arandom effect batch:pen (Intercept): variance 1.927