Clinical significance of asthma clusters by longitudinal analysis in Korean asthma cohort

So Young Park, Seunghee Baek, Sujeong Kim, Sun Young Yoon, Hyouk Soo Kwon, Yoon Seok Chang, You Sook Cho, An Soo Jang, Jung Won Park, Dong Ho Nahm, Ho Joo Yoon, Sang Heon Cho, Young Joo Cho, Byoung Whui Choi, Hee Bom Moon, Tae Bum Kim

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16 Scopus citations


Background: We have previously identified four distinct groups of asthma patients in Korean cohorts using cluster analysis: (A) smoking asthma, (B) severe obstructive asthma, (C) early-onset atopic asthma, and (D) late-onset mild asthma. Methods and Results: A longitudinal analysis of each cluster in a Korean adult asthma cohort was performed to investigate the clinical significance of asthma clusters over 12 months. Cluster A showed relatively high asthma control test (ACT) scores but relatively low FEV1 scores, despite a high percentage of systemic corticosteroid use. Cluster B had the lowest mean FEV1, ACT, and the quality of life questionnaire for adult Korean asthmatics (QLQAKA) scores throughout the year, even though the percentage of systemic corticosteroid use was the highest among the four clusters. Cluster C was ranked second in terms of FEV1, with the second lowest percentage of systemic corticosteroid use, and showed a marked improvement in subjective symptoms over time. Cluster D consistently showed the highest FEV1, the lowest systemic corticosteroid use, and had high ACT and QLQAKA scores. Conclusion: Our asthma clusters had clinical significance with consistency among clusters over 12 months. These distinctive phenotypes may be useful in classifying asthma in real practice.

Original languageEnglish
Article numbere83540
JournalPLoS ONE
Issue number12
StatePublished - 31 Dec 2013


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