title: Psychometric testing of the Duke Activity Status Index in patients with heart failure.
abstract: BACKGROUND
  Patients with heart failure (HF) experience difficulty performing activities of daily living. As impaired functional status is adversely associated with outcomes, it is important to accurately evaluate patient functional status. The Duke Activity Status Index (DASI) is a 12-item, self-administered questionnaire to measure functional status. However, its psychometric properties have not been determined in patients with HF. The purpose of this study was to examine the psychometric properties of the DASI in patients with HF.
  
  
  RESULTS
  We used data from 297 patients with a diagnosis of HF (age 61±11 years, 31% female) for psychometric testing. Internal consistency reliability of the DASI was high (Cronbach's alpha=0.86). Criterion-related validity was supported by significantly different DASI scores for each New York Heart Association classification. Construct validity was supported by significant correlation of DASI scores with health-related quality of life (r = -0.64), depressive symptoms (r = -0.44), and N-terminal B-type natriuretic peptide (r = -0.14).
  
  
  CONCLUSIONS
  Our data support the psychometric properties of the DASI as a measure of functional status in patients with HF. This instrument can be used to evaluate functional status and enhance health care provider understanding of functional status related to daily living from the patient perspective.
authors: Shandong University, China.
authors: Xiuzhen
authors: X
authors: Fan
authors: Chungnam National University, South Korea kslee14@cnu.ac.kr.
authors: Kyoung Suk
authors: KS
authors: Lee
authors: University of Kentucky, USA.
authors: Susan K
authors: SK
authors: Frazier
authors: University of Kentucky, USA.
authors: Terry A
authors: TA
authors: Lennie
authors: University of Kentucky, USA.
authors: Debra K
authors: DK
authors: Moser
mesh_terms: D000203:Activities of Daily Living; D000367:Age Factors; D000368:Aged; D003430:Cross-Sectional Studies; D017079:Exercise Tolerance / Q000502:physiology*; D005260:Female; D005500:Follow-Up Studies; D006333:Heart Failure / Q000175:diagnosis / Q000523:psychology* / Q000534:rehabilitation; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology; D020097:Natriuretic Peptide, Brain / Q000378:metabolism*; D011594:Psychometrics; D012042:Registries; D015203:Reproducibility of Results; D018570:Risk Assessment; D012720:Severity of Illness Index; D012737:Sex Factors; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires
chemical_list: D020097:Natriuretic Peptide, Brain
keywords: Functional status; heart failure; psychometric properties