Table 4. Factors related to 5-year mortality following hospitalization due to AECOPD.

Variables	Hazard ratio	95% CI	P value
Age	1.04	1.02–1.05	<0.0001
AF	1.37	1.05–1.78	0.0200
Dementia	2.79	1.55–5.02	0.0010
NIV	1.38	1.03–1.86	0.0300
Mean stay	1.03	1.02–1.04	<0.0001
Admission to IMU	1.41	1.09–1.84	0.0090

AECOPD, acute exacerbations of COPD; AF, atrial fibrillation; NIV, non-invasive ventilation; IMU, Internal Medicine Unit.