Asthma Clinical Trial
Official title:
Identification of Asthma Phenotypes in Severe Asthmatics
Asthma is a heterogenous disease. Different patients have different presentations, course of disease and response to treatment. The investigators would like to study our population of more severe asthma and find out about their profile - demographic, clinical and inflammatory.
Asthma is a heterogeneous disorder presenting with many phenotypes. Most asthmatics have mild to moderate disease. However, 5-20% of asthmatics belong to the "Difficult-to-treat" or more severe group and they account for 50-80% of asthma health care costs. In a tertiary hospital like Singapore General Hospital, most of our asthmatics belong to the more severe group. They have more frequent healthcare visits, hospitalizations, medication use and higher risks of death. There is currently no local data on the phenotypic profile of our patients. Asthma phenotypes which have been identified include those related to triggers ( eg. drugs such as aspirin or NSAIDS, environmental allergen, occupational allergens or irritants, exercise) or clinical physiological phenotypes ( eg. severity-defined, exacerbation-prone, chronic airflow limitation, steroid-resistant, age -of -onset) or inflammatory phenotypes ( eg. eosinophilic, neutrophilic, pauci granulocytic, mixed). With better understanding of their phenotypes, treatment can then be individually tailored to improve their asthma control and reduce future risks. We aim to improve the understanding of this group of asthmatics such that better treatment approaches can be developed in the future. This is not a clinical trial. Its purpose is to gather information ranging from demographic data, medical history to responses to simple routine questions, to lung function, inflammation, allergy and blood testing results. The data are analyzed to improve our understanding of the clinical and inflammatory phenotypes ( or profiles) in this group of patients. ;
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