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A brief self-administered questionnaire to determine functional capacity (The Duke Activity Status Index)

https://doi.org/10.1016/0002-9149(89)90496-7Get rights and content

Abstract

To develop a brief, self-administered questionnaire that accurately measures functional capacity and assesses aspects of quality of life, 50 subjects undergoing exercise testing with measurement of peak oxygen uptake were studied. All subjects were questioned about their ability to perform a variety of common activities by an interviewer blinded to exercise test findings. A 12-item scale (the Duke Activity Status index) was then developed that correlated well with peak oxygen uptake (Spearman correlation coefficient 0.80). To test this new index, an independent group of 50 subjects completed a self-administered questionnaire to determine functional capacity and underwent exercise testing with measurement of peak oxygen uptake. The Duke Activity Status Index correlated significantly (p < 0.0001) with peak oxygen uptake (Spearman correlation coefficient 0.58) in this independent sample. The Duke Activity Status Index is a valid measure of functional capacity that can be obtained by self-administered questionnaire.

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This study was supported in part by grants HL-36587 and HL-17670 from the National Heart, Lung, and Blood Institute, Bethesda, Maryland; grants HS-05635 and HS-04873 from the National Center for Health Services Research, Hyattsville; grant LM-04613 from the National Library of Medicine, Bethesda; and grants from the Andrew W. Mellon Foundation, New York, New York and the Robert Wood Johnson Foundation, Princeton, New Jersey.

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