Seoul National University Airway Registry
Seoul National University Airway Registry
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.
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:

 -