Age

0–80

Sex

ALL

Healthy volunteers

Not accepted

Patients with bronchial asthma or other severe pulmonary diseases or having received pulmonary surgery in 6 months
Patients with tumor history during past 5 years
Patients with COPD exacerbations during past 4 weeks
Participants in clinical trials
Patients in pregnancy or breastfeeding
Patients unable to complete questionaire independently
Patients older than 80 years old
Patients receiving long-term domiciliary oxygen therapy

Intervention Strategy in Chronic Obstructive Pulmonary Disease With Anxiety and Depression