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Heterogeneity of Childhood Asthma in Korea: Cluster Analysis of the Korean Childhood Asthma Study Cohort

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Abstract
Purpose: Asthma is a heterogeneous airway disease occurring in children, and it has various clinical phenotypes. A clear differentiation of the clinical phenotypes can provide better asthma management and prediction of asthma prognosis. Little is currently known about asthma phenotypes in Korean children. This study was designed to identify asthma phenotypes in school-aged Korean children.

Methods: This study enrolled 674 children with physician-diagnosed asthma from the Korean childhood Asthma Study (KAS) cohort. The physicians verified the relevant histories of asthma and comorbid diseases, as well as airway lability and hyper-responsiveness from the results of pulmonary function tests and bronchial provocation tests. Questionnaires regarding the participants' baseline characteristics, their environment and self-rating of asthma control were collected at the time of enrollment. Laboratory tests were performed to assess allergy and airway inflammation. Children with asthma were classified by hierarchical cluster analysis.

Results: Of the 674 patients enrolled from the KAS cohort, 447 were included in the cluster analysis. Cluster analysis of these 447 children revealed 4 asthma phenotypes: cluster 1 (n = 216, 48.3%) which was characterized by male-dominant atopic asthma; cluster 2 (n = 79, 17.7%) which was characterized by early-onset atopic asthma with atopic dermatitis; cluster 3 (n = 47,10.5%) which was characterized by puberty-onset, female-dominant atopic asthma with the low lung function; and cluster 4 (n =105, 23.5%) which was characterized by earlyonset, non-atopic dominant asthma.

Conclusions: The asthma phenotypes among Korean children can be classified into 4 distinct clusters. Long-term follow-up with these phenotypes will be needed to define their prognosis and response to treatment.
Author(s)
권지원김우경김형영김환수백혜성서동인서주희송대진신미용신연호양현종우성일유영윤지선이은이주석임대현장광천정성수한민규엄은진김진택유진호
Issued Date
2021
Type
Article
Keyword
Asthmachildhoodphenotypecluster analysis
DOI
10.4168/aair.2021.13.1.42
URI
https://oak.ulsan.ac.kr/handle/2021.oak/7981
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_nrf_kci_oai_kci_go_kr_ARTI_9699760&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Heterogeneity%20of%20Childhood%20Asthma%20in%20Korea:%20Cluster%20Analysis%20of%20the%20Korean%20Childhood%20Asthma%20Study%20Cohort&offset=0&pcAvailability=true
Publisher
ALLERGY ASTHMA IMMUNOLOGY RESEARCH
Location
대한민국
Language
영어
ISSN
2092-7355
Citation Volume
13
Citation Number
1
Citation Start Page
42
Citation End Page
55
Appears in Collections:
Medicine > Medicine
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