A Multicentre Study to Explore the Diagnostic Value of Bronchodilation Test With Portable Oscillometry in Asthma Diagnosis
This is a multi-center study to explore the positive predictive value of bronchodilation test with portable oscillometry compared to either BDT or BPT with spirometry in asthma diagnosis and to compare it with bronchodilation with spirometry (the current gold standard). In the study, the target patients' profile is the suspected asthma patient with asthmatic symptoms (wheezing, shortness of breath, chest tightness, and/or cough) and aim to enroll 500 participants from 25 sites across different regions in China.
⁃ Participants must meet all the following criteria and sign an informed consent form (ICF) to be eligible for the study.
• Patient must be aged 18-75 years old at the time of enrollment.
• Presented with asthmatic symptoms such as wheezing, shortness of breath, chest tightness and cough ≥2 months prior to enrollment (Day 0), with/without an established asthma diagnosis.