A Study to Determine the Clinical Characteristics, Comorbidities, Treatment Status and Exacerbations of Asthma Patients

This is a prospective cohort study that aims to determine the current demographics, clinical characteristics, comorbidities, treatment status and exacerbations of asthma patients. The primary objective of this study is to determine the current demographics, clinical characteristics, comorbidities, treatment status and exacerbations of asthma patients. The secondary objectives include: (1) to review the current practices of symptom control assessment, (2) to determine the choice of pharmacological regimen, rate of guideline adherence and real-world clinical practice in managing asthma patients, (3) to evaluate the pattern of lung function parameters (spirometry and forced oscillometry technique \[FOT\]) in adult asthma patients, (4) to evaluate the effect of ageing on the trend of change in lung function parameters (spirometry and FOT) in adult asthma patients, (5) to identify biomarkers that help to categorize different asthma phenotypes and predict subsequent prognosis, (6) to determine the risk factors of uncontrolled asthma and asthma exacerbation, (7) to evaluate the impact of comorbidities on asthma control. 400 out-patient asthma patients are planned to be recruited and they will be followed up for 3 years.