Seoul National University Airway Registry

Overview

This is a multicenter, prospective observational cohort study, in which patients with chronic airway diseases including chronic obstructive pulmonary disease(COPD), asthma, asthma-COPD overlap syndrome (ACOS) will be recruited.

Eligibility

COPD

Inclusion Criteria:

• Postbronchodilator FEV1/FVC < 0.7 AND chronic respiratory symptom

Exclusion Criteria:

-

Asthma

Inclusion Criteria:

• Never smoker or <5PY of smoking history AND Recurrent episodes of asthma symptoms (wheezing, dyspnea, chest tightness, cough) AND (either Positive BDR OR positive metacholine/mannitol/exercise provocation test)

Exclusion Criteria:

-

ACOS

Inclusion Criteria:

• COPD AND Asthma (regardless of smoking status)

Exclusion Criteria:

-