Document Detail


A nomogram to predict exercise capacity from a specific activity questionnaire and clinical data.
MedLine Citation:
PMID:  8147307     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Recent investigations suggested that clinical exercise testing can be optimized by individualizing the protocol, depending on the purpose of the test and the subject tested. This requires some knowledge of a patient's exercise capacity before beginning the test. The accuracy of a simple physical activity questionnaire and readily available clinical data in predicting subsequent treadmill performance was examined. A brief, self-administered questionnaire (VSAQ) was developed for veterans who were referred to exercise testing for clinical reasons. The VSAQ was designed to determine which specific daily activities were associated with symptoms of cardiovascular disease (fatigue, chest pain and shortness of breath). Two hundred twelve consecutive patients (mean age 62 +/- 8 years) referred for maximal exercise testing were studied. Clinical and demographic variables were added to VSAQ responses in a stepwise regression model to determine their ability to predict treadmill performance. Only metabolic equivalents by VSAQ, and age were significant predictors of treadmill performance; these 2 variables yielded R = 0.82 (SEE 1.43; p < 0.001), and explained 67% of the variance in exercise capacity. The regression equation reflecting the relation between age, VSAQ and exercise capacity was: achieved metabolic equivalents = 4.7 + 0.97 (VSAQ) - 0.06 (age). Using this equation, a nomogram was developed. Incorporating the VSAQ with the nomogram requires only a few minutes, and yields a reasonably accurate estimate of a patient's exercise capacity. Although the present equation is population-specific, a similar approach in different populations may be useful for individualizing protocols for clinical exercise testing.
Authors:
J Myers; D Do; W Herbert; P Ribisl; V F Froelicher
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of cardiology     Volume:  73     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1994 Mar 
Date Detail:
Created Date:  1994-04-29     Completed Date:  1994-04-29     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  591-6     Citation Subset:  AIM; IM    
Affiliation:
Cardiology Division, Palo Alto Veterans Affairs Medical Center, California 94304.
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MeSH Terms
Descriptor/Qualifier:
Activities of Daily Living
Age Factors
Disability Evaluation
Energy Metabolism
Exercise Test / statistics & numerical data
Exercise Tolerance* / physiology
Female
Heart Diseases / diagnosis*,  epidemiology
Humans
Male
Middle Aged
Questionnaires
Reference Values
Regression Analysis
Veterans

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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