Chronic obstructive pulmonary disease (COPD) adult 2 chronic obstructive lung disease 2 controlled study 2 female 2 human 2 male 2 Aged 1 Article 1 Chi-Square Distribution 1 Classification 1 Female 1 HRQoL 1 Hospital admission and hospital stay 1 Humans 1 Interviews as Topic 1 Logistic Models 1 Lung 1 Male 1 Middle Aged 1 Multivariate Analysis 1 Novelty detection 1 Odds Ratio 1 Patient Admission 1 Prognosis 1 Pulmonary Disease, Chronic Obstructive 1 Quality of Life 1 Questionnaires 1 Recurrence 1 Respiratory pattern 1