A study to evaluate the consistency of oscillometry and spirometry test results in patients with confirmed or suspected asthma or COPD - IOS

Inclusion Criteria

• Participants are eligible to be included in the study only if all of the following criteria apply and signed informed content :
• Suspected and confirmed asthma
• 1 Participant must be≥18 years old.
• 2 Present symptom such as wheezing, cough, chest tightness, shortness of breath, but not confirmed-asthma (without evidence of variable airflow restriction) or confirmed-asthma with evidence of variable airflow restriction (such as positive bronchodilation test, positive bronchial challenge test, variability >10% in twice daily PEF over 2 weeks, et al)
• Suspected and confirmed COPD
• 1 Participant must be ≥40 years old.
• 2 Present symptom such as chronic cough, sputum production, dyspnoea, but not confirmed-COPD (without evidence of persistent airflow restriction) or confirmed- COPD with evidence of persistent airflow restriction (post-bronchodilator FEV1/FVC＜0.7)