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The Baltimore activity scale for intermittent claudication: a validation study.

Andrew W Gardner1, Polly S Montgomery

  • 1CMRI Metabolic Research Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA andrew-gardner@ouhsc.edu

Vascular and Endovascular Surgery
|October 14, 2006
PubMed
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The Baltimore Activity Scale for Intermittent Claudication (BASIC) questionnaire accurately measures physical activity in peripheral arterial disease patients. Exercise rehabilitation significantly improved BASIC scores, indicating increased activity levels.

Area of Science:

  • Cardiology
  • Rehabilitation Medicine
  • Exercise Physiology

Background:

  • Peripheral arterial disease (PAD) significantly impacts quality of life, with intermittent claudication (IC) limiting physical activity.
  • Accurate assessment of physical activity is crucial for managing PAD and evaluating rehabilitation effectiveness.

Purpose of the Study:

  • To develop and cross-validate the Baltimore Activity Scale for Intermittent Claudication (BASIC) questionnaire.
  • To assess the BASIC questionnaire's ability to detect changes in physical activity following exercise rehabilitation in PAD patients with IC.

Main Methods:

  • A total of 702 patients with PAD and IC were assessed using the BASIC questionnaire and accelerometry for validation and cross-validation.
  • A subset of 61 patients participated in a 6-month randomized controlled trial comparing supervised exercise rehabilitation to usual care.

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Main Results:

  • The BASIC questionnaire score strongly predicted daily physical activity (R=0.76, P < .0001) and was successfully cross-validated.
  • Patients in the exercise rehabilitation group showed a significant 38% increase in BASIC scores (P < .01), while the control group did not.

Conclusions:

  • The 5-item BASIC questionnaire is a valid and reliable tool for estimating daily physical activity in PAD patients with IC.
  • The BASIC questionnaire is sensitive to changes in physical activity levels, demonstrating its utility in evaluating the effectiveness of exercise rehabilitation programs.