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Phys Ther. 2014 Jun;94(6):866-74. doi: 10.2522/ptj.20130385. Epub 2014 Feb 20.

Validity and reliability of the community balance and mobility scale in individuals with knee osteoarthritis.

Author information

1
J. Takacs, MSc, Department of Physical Therapy, University of British Columbia, Vancouver, British Columbia, Canada.
2
S.J. Garland, PT, PhD, Department of Physical Therapy, University of British Columbia.
3
M.G. Carpenter, PhD, School of Kinesiology, University of British Columbia.
4
M.A. Hunt, PT, PhD, Department of Physical Therapy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z3. michael.hunt@ubc.ca.

Abstract

BACKGROUND:

There is a high incidence of falls in older adults with knee osteoarthritis (OA). Adequate dynamic balance and mobility reduce the risk of falls; however, there are currently no validated, advanced tests of dynamic balance and mobility for individuals with knee OA.

OBJECTIVE:

The purpose of this study was to determine the convergent validity, known-groups validity, and test-retest reliability of a dynamic test of balance and mobility, the Community Balance and Mobility Scale (CB&M), in a knee OA population.

DESIGN:

A cross-sectional design was used.

METHODS:

Twenty-five individuals aged 50 years and older with medial knee OA and an equal number of healthy controls completed the CB&M and other tests of balance and mobility, including the Berg Balance Scale, the Timed "Up & Go" Test, a test of maximal single-leg stance time, and the 10-Meter Walk Test (self-selected and fast walking speed). Convergent validity of balance tests with the CB&M was assessed using Pearson product moment correlation coefficients, and known-groups validity was assessed using independent t tests. Test-retest reliability of the CB&M was assessed using intraclass correlation coefficients (ICCs) and standard error of measurement (SEM).

RESULTS:

Scores on the CB&M were significantly correlated with all measures of balance and mobility for those with knee OA. There were significant differences in CB&M scores between groups. Scores on the CB&M were highly reliable in people with knee OA (ICC=.95, 95% confidence interval [95% CI]=0.70 to 0.99; SEM=3, 95% CI=2.68 to 4.67).

LIMITATIONS:

Few participants had severe knee OA.

CONCLUSIONS:

The CB&M displayed moderate convergent validity, excellent known-groups validity, and high test-retest reliability. The CB&M can be used as a valid and reliable tool to assess dynamic balance and mobility deficits in people with knee OA.

PMID:
24557649
PMCID:
PMC4040425
DOI:
10.2522/ptj.20130385
[Indexed for MEDLINE]
Free PMC Article

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