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Contributors of the severity of airflow limitation in COPD patients

Title
Contributors of the severity of airflow limitation in COPD patients
Authors
Hong Y.Chae E.J.Seo J.B.Lee J.-H.Kim E.-K.Lee Y.K.Kim T.-H.Kim W.J.Lee J.H.Lee S.-M.Lee S.Lim S.Y.Shin T.R.Yoon H.I.Sheen S.S.Ra S.W.Lee J.S.Huh J.W.Lee S.-D.Oh Y.-M.
Ewha Authors
이진화
SCOPUS Author ID
이진화scopus
Issue Date
2012
Journal Title
Tuberculosis and Respiratory Diseases
ISSN
1738-3536JCR Link
Citation
vol. 72, no. 1, pp. 8 - 14
Indexed
SCOPUS; KCI scopus
Abstract
Background: Although airway obstruction in chronic obstructive pulmonary disease (COPD) is due to pathologic processes in both the airways and the lung parenchyma, the contribution of these processes, as well as other factors, have not yet been evaluated quantitatively. We therefore quantitatively evaluated the factors contributing to airflow limitation in patients with COPD. Methods: The 213 COPD patients were aged >45 years, had smoked >10 pack-years of cigarettes, and had a post-bronchodilator forced expiratory volume in one second (FEV 1)/forced vital capacity (FVC) <0.7. All patients were evaluated by medical interviews, physical examination, spirometry, bronchodilator reversibility tests, lung volume, and 6-minute walk tests. In addition, volumetric computed tomography (CT) was performed to evaluate airway wall thickness, emphysema severity, and mean lung density ratio at full expiration and inspiration. Multiple linear regression analysis was performed to identify the variables independently associated with FEV 1 - the index of the severity of airflow limitation. Results: Multiple linear regression analysis showed that CT measurements of mean lung density ratio (standardized coefficient β= -0.46; p<0.001), emphysema severity (volume fraction of the lung less than -950 HU at full inspiration; β= -0.24; p<0.001), and airway wall thickness (mean wall area %; β= -0.19, p=0.001), as well as current smoking status (β = -0.14; p=0.009) were independent contributors to FEV 1. Conclusion: Mean lung density ratio, emphysema severity, and airway wall thickness evaluated by volumetric CT and smoking status could independently contribute to the severity of airflow limitation in patients with COPD. Copyright©2012. The Korean Academy of Tuberculosis and Respiratory Diseases. All rights reserved.
DOI
10.4046/trd.2012.72.1.8
Appears in Collections:
의학전문대학원 > 의학과 > Journal papers
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