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Related Experiment Videos

Self-selected walking speed was consistent when recorded while using a cane.

Carlos O Weiss1, Christopher L Seplaki, Jennifer L Wolff

  • 1Division of Geriatric Medicine & Gerontology, Johns Hopkins School of Medicine, Baltimore, MD 21224-2734, USA. cweiss9@jhmi.edu

Journal of Clinical Epidemiology
|May 13, 2008
PubMed
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Using a cane does not affect the consistency or accuracy of self-selected walking speed (SSWS) measurements in older women. This finding supports the use of assistive devices during mobility assessments.

Area of Science:

  • Gerontology
  • Biomechanics
  • Clinical Measurement

Background:

  • Self-selected walking speed (SSWS) is a key indicator of mobility and health in older adults.
  • The use of assistive devices, such as canes, is common in this population.
  • It is important to understand if cane use impacts the reliability of SSWS measurements.

Purpose of the Study:

  • To determine if allowing older individuals to use a cane during SSWS measurement introduces inconsistencies or systematic errors.
  • To evaluate the reliability and validity of SSWS measurements with and without cane use.

Main Methods:

  • Observational study involving 1,002 women aged 65+ from the Women's Health and Aging Study I.
  • SSWS was measured with and without the use of a cane for individuals who typically use one.

Related Experiment Videos

  • Statistical analyses included Coefficient of Variation, Intra-Class Correlation Coefficient, and Bland-Altman plots.

    • Main Results:

    • The Coefficient of Variation for SSWS was low, with minimal difference whether a cane was used (12.04%) or not (10.72%).
    • High Intra-Class Correlation Coefficients (0.958 without cane, 0.962 with cane) indicated excellent consistency.
    • Bland-Altman plots showed only small systematic differences between trials, regardless of cane use.

    Conclusions:

    • Cane use during SSWS measurement does not compromise measurement consistency or introduce significant bias in older women.
    • The findings suggest that SSWS can be reliably measured with or without a cane in this population.
    • This supports the inclusion of cane users in mobility studies without concerns about measurement error due to assistive device use.