Document Detail

A factor analysis of dyspnea indexes and lung function parameters in patients with chronic obstructive pulmonary disease.
MedLine Citation:
PMID:  11930829     Owner:  NLM     Status:  MEDLINE    
The purpose of the present study was to investigate the correlation between dyspnea ratings and a large group of lung function parameters, and extract those factors that best reflect the functional profile of patients with COPD using factor analysis. Ninety nine patients with COPD in stable clinical condition (age 60 +/- 8 years, ATS score = 2.5 +/- 0.9, FEV1% pred. = 33 +/- 13%) were included in the study. The factor analysis of the results yielded 5 factors which accounted for 80.1% of the total variance of the changes. The highest coefficients found between the factors and the original group of variables after Varimax rotation are given in the following table: Factor 1: Oxygen-cost diagram: 0.92; ATS dyspnea score: -0.80; TL,CO/VA: 0.78; Factor 2: FEV1% pred.: 0.87; FEV1/VC%: 0.86; FEV1L: 0.79; Factor 3: MIF50% pred.: 0.85; FIV1% pred.: 0.76; PImax: 0.67; Factor 4: PaCO2: -0.81; SaO2: 0.77; Mean pulmonary arterial pressure: -0.67 Factor 5: Age: 0.88; Six minutes walk distance: -0.72 The factor analysis showed that the functional profile of COPD patients has several dimensions. Therefore, in order to have COPD comprehensively evaluated, assessment of dyspnea and the respective set of lung function parameters (exercise capacity, forced inspiration and pulmonary hemodynamics), should be included in the battery of tests, besides the conventional tests.
S S Kostianev; V A Hodzhev; I T Todorov; A S Hristova; P V Mandulova; D H Iluchev
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Folia medica     Volume:  43     ISSN:  0204-8043     ISO Abbreviation:  Folia Med (Plovdiv)     Publication Date:  2001  
Date Detail:
Created Date:  2002-04-04     Completed Date:  2002-04-16     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  2984761R     Medline TA:  Folia Med (Plovdiv)     Country:  Bulgaria    
Other Details:
Languages:  eng     Pagination:  27-31     Citation Subset:  IM    
Department of Pathologic Physiology, Higher Medical Institute, 15A Vassil Aprilov St., 4000 Plovdiv, Bulgaria.
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MeSH Terms
Dyspnea / etiology*
Factor Analysis, Statistical
Lung / physiopathology*
Pulmonary Disease, Chronic Obstructive / complications*,  physiopathology*

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