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

Table 5 Results of the linear mixed-effects model for the nursery period with log-transformed summary score per pen-week as outcome variable and pen nested in batch as random effect (random intercept): results of the models for each individual explanatory variable, the full model and the final model

Nursery	Individual models		Full model		Final model^a
Fixed effect	Estimate	P-value	Estimate	P-value	Estimate	P-value
Week	0.072	0.001	−0.078	0.070	−0.041	0.001
SG (CG = baseline)	0.259	0.141	−0.322	0.067
day/night temperature range	−0.010	0.698	0.157	0.005	0.135	0.014
average temperature	−0.075	0.037	−0.269	0.001	−0.226	0.003
ammonia concentration	−0.005	0.682	0.007	0.637
air velocity	−0.321	0.936	3.895	0.402

^arandom effect batch:pen (Intercept): variance 0.1271, residual variance 0.2643

ISSN: 2055-5660