Predictors of exercise capacity and everyday activity in older heart failure patients

Miles D Witham, Ishbel S Argo, Derek W Johnston, Allan D Struthers, Marion E T McMurdo

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Background: Exercise capacity and daily activity are key outcomes for older, frail heart failure patients. Little is known about the determinants of these outcomes in this patient group.

Aims: To explore predictors of exercise capacity and daily activity in older, frail heart failure patients.

Methods: Analysis of prospectively collected data from a cohort of 82 patients aged 70 years and over, enrolled in a randomised controlled trial of exercise in heart failure patients. Pathophysiological, demographic, psychological and social factors were analysed by multivariate regression to determine predictors of exercise capacity (6-min walk distance) and daily activity (daily accelerometer counts).

Results: Between 49% and 55% of the variance in 6-min walk distance was explained by variables including New York Heart Association class, depression score, attitude to ageing and use of walking aids. Only 11% to 26% of the variance in accelerometer scores was explained by the model; 6-min walk distance was the only consistent predictor of daily activity.

Conclusions: Physical, psychological and attitudinal variables contribute to variance of the 6-min walk. Six-minute walk distance predicts a small amount of the variance in daily activity, but the majority of variance in daily activity remains unexplained and requires further investigation. (c) 2005 European Society of Cardiology. Published by Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)203-207
Number of pages5
JournalEuropean Journal of Heart Failure
Volume8
Issue number2
DOIs
Publication statusPublished - Mar 2006

Keywords

  • Activities of Daily Living
  • Aged
  • Aged, 80 and over
  • Chronic Disease
  • Cohort Studies
  • Exercise Test
  • Exercise Tolerance
  • Female
  • Heart Failure
  • Humans
  • Male
  • Prospective Studies
  • Congestive
  • Exercise Capacity
  • Daily Activity
  • Quality-of-Life
  • 6-minute walk test
  • Physical-Activity
  • Customary Activity
  • Elderly-Patients
  • Reliability
  • Performance
  • Validity
  • Program
  • Trial

Cite this

Predictors of exercise capacity and everyday activity in older heart failure patients. / Witham, Miles D; Argo, Ishbel S; Johnston, Derek W; Struthers, Allan D; McMurdo, Marion E T.

In: European Journal of Heart Failure, Vol. 8, No. 2, 03.2006, p. 203-207.

Research output: Contribution to journalArticle

Witham, Miles D ; Argo, Ishbel S ; Johnston, Derek W ; Struthers, Allan D ; McMurdo, Marion E T. / Predictors of exercise capacity and everyday activity in older heart failure patients. In: European Journal of Heart Failure. 2006 ; Vol. 8, No. 2. pp. 203-207.
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abstract = "Background: Exercise capacity and daily activity are key outcomes for older, frail heart failure patients. Little is known about the determinants of these outcomes in this patient group.Aims: To explore predictors of exercise capacity and daily activity in older, frail heart failure patients.Methods: Analysis of prospectively collected data from a cohort of 82 patients aged 70 years and over, enrolled in a randomised controlled trial of exercise in heart failure patients. Pathophysiological, demographic, psychological and social factors were analysed by multivariate regression to determine predictors of exercise capacity (6-min walk distance) and daily activity (daily accelerometer counts).Results: Between 49{\%} and 55{\%} of the variance in 6-min walk distance was explained by variables including New York Heart Association class, depression score, attitude to ageing and use of walking aids. Only 11{\%} to 26{\%} of the variance in accelerometer scores was explained by the model; 6-min walk distance was the only consistent predictor of daily activity.Conclusions: Physical, psychological and attitudinal variables contribute to variance of the 6-min walk. Six-minute walk distance predicts a small amount of the variance in daily activity, but the majority of variance in daily activity remains unexplained and requires further investigation. (c) 2005 European Society of Cardiology. Published by Elsevier B.V. All rights reserved.",
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AB - Background: Exercise capacity and daily activity are key outcomes for older, frail heart failure patients. Little is known about the determinants of these outcomes in this patient group.Aims: To explore predictors of exercise capacity and daily activity in older, frail heart failure patients.Methods: Analysis of prospectively collected data from a cohort of 82 patients aged 70 years and over, enrolled in a randomised controlled trial of exercise in heart failure patients. Pathophysiological, demographic, psychological and social factors were analysed by multivariate regression to determine predictors of exercise capacity (6-min walk distance) and daily activity (daily accelerometer counts).Results: Between 49% and 55% of the variance in 6-min walk distance was explained by variables including New York Heart Association class, depression score, attitude to ageing and use of walking aids. Only 11% to 26% of the variance in accelerometer scores was explained by the model; 6-min walk distance was the only consistent predictor of daily activity.Conclusions: Physical, psychological and attitudinal variables contribute to variance of the 6-min walk. Six-minute walk distance predicts a small amount of the variance in daily activity, but the majority of variance in daily activity remains unexplained and requires further investigation. (c) 2005 European Society of Cardiology. Published by Elsevier B.V. All rights reserved.

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