Table 3.

Andersen-Gil Model estimated for patients with COPD.

Variable	Estimated model for the first transition					Estimated model for the second transition
	Value parameter	Pr > |χ2|	Odds Ratio	CI 95%		Value parameter	Pr > |χ2|	Odds Ratio	CI 95%
Age	-0.00027	0.8311	1.000	0.997	1.002	-0.00283	0.3211	1.003	0.997	1.008
Sex (ref. Female)	-0.01819	0.4257	0.982	0.939	1.027	0.00668	0.8992	1.007	0.908	1.116
Anamnesis of Chronic Respiratory Disease	0.09281	<.0001	1.097	1.048	1.149	0.04916	0.3063	1.050	0.956	1.154
COPD in Prime Diagnosis at first admission	0.47950	<.0001	1.615	1.536	1.699	0.17669	0.0004	1.193	1.083	1.315
Diagn. 491.21 (ref. 491.20)	0.17112	<.0001	1.187	1.132	1.244	-0.06166	0.2537	0.940	0.846	1.045
Diagn. 518.81 (ref. 491.20)	0.48090	<.0001	1.618	1.536	1.703	0.24576	<.0001	1.279	1.156	1.414
Charlson index	-0.03458	0.0058	0.966	0.943	0.990	-0.03496	0.2311	0.966	0.912	1.023
Infection Lower resp. tract.	-0.17754	0.1773	0.837	0.647	1.084	0.56963	0.0075	1.768	1.164	2.684
Heart Failure	-0.00233	0.9693	0.998	0.886	1.123	-0.09379	0.4532	0.910	0.713	1.163
Discharge Intensive Care	0.98873	0.0096	2.688	1.271	5.682	1.32490	0.1890	3.762	0.521	27.159
Discharge. Recovery and Rehabilitation	0.28495	0.4546	1.330	0.630	2.806	0.74241	0.4600	2.101	0.293	15.055
Discharge Internal Medicine	0.16840	0.6566	1.183	0.563	2.486	0.97456	0.3313	2.650	0.371	18.932
Discharge Important other	0.00887	0.9813	1.009	0.480	2.120	0.79674	0.4277	2.218	0.310	15.886
Discharge Pneumology	0.21459	0.5698	1.240	0.590	2.608	0.97633	0.3304	2.655	0.372	18.961
Hospital type (ref. U/R Hospital)	0.12407	<.0001	1.132	1.076	1.191	-0.03918	0.5182	0.962	0.854	1.083