A Study to Evaluate the Consistency of Oscillometry and Spirometry Test Results in Patients With Confirmed or Suspected Asthma or COPD

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)