Table 6.

Odds ratio, confidence intervals and P-value for all pens included in the study

	Odd ratio	95% CI		P value
Lame pigs
Year 2013	Intercept
Year 2014	0.547	0.516	0.579	<0.001
Year 2015	0.382	0.359	0.407	<0.001
Year 2016	0.298	0.268	0.331	<0.001
Pigs requiring hospitalization
Year 2013	Intercept
Year 2014	0.651	0.591	0.716	<0.001
Year 2015	0.364	0.327	0.406	<0.001
Year 2016	0.297	0.248	0.356	<0.001
Severe tail lesions
Year 2013	Intercept
Year 2014	1.331	1.211	1.463	<0.001
Year 2015	1.287	1.167	1.419	<0.001
Year 2016	1.108	0.958	1.280	0.166
Severe body marks
Year 2013	Intercept
Year 2014	1.129	1.057	1.206	<0.001
Year 2015	0.872	0.813	0.935	<0.001
Year 2016	0.533	0.472	0.601	<0.001
Enrichment use ratio
Year 2013	Intercept
Year 2014	1.053	0.973	1.140	0.199
Year 2015	1.422	1.292	1.564	<0.001
Year 2016	1.295	1.071	1.566	<0.001

The proportion of lame pigs, pigs requiring hospitalization, the proportion of pig with severe tail lesions, the proportion of pigs with severe body marks and the proportion of pigs that interacts with the enrichment were the dependent variables and the year was the independent variable in a model that considered the farm as a random effect.