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Clin Rehabil. 2002 May;16(3):306-14.

Reliability of gait speed measured by a timed walking test in patients one year after stroke.

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1
Bradford Community NHS Trust, West Yorkshire, UK.

Abstract

OBJECTIVE:

To assess the reliability of gait speed in late-stage stroke patients.

DESIGN:

Test-retest reliability of three timed walks to 10 metres repeated during two assessments one week apart.

SETTING:

The patient's home.

SUBJECTS:

Twenty-two stroke patients with mobility problems more than one year after stroke.

MAIN OUTCOME MEASURE:

Gait speed measured in seconds taken to walk 10 metres.

STATISTICAL ANALYSIS:

Intraclass correlations (ICCs) with 95% confidence interval (CI) and the Bland and Altman method for assessing agreement by calculating the mean difference between measurements (d); the 95% CI for d; the standard deviation of the difference (SDdiff); a reliability coefficient and the 95% limits of agreement.

RESULTS:

There was a trend for decreased times taken to walk 10 metres both within each assessment and between assessments. ICCs for within-assessment reliability were 0.95-0.99. The d (SDdiff) for the second and third walks for assessment 1 was -1.00 (2.63) seconds and for assessment 2 was -0.70 (1.58) seconds. The reliability coefficient was 5.26 for assessment 1 and 3.17 for assessment 2. ICCs for between-assessment reliability were 0.87-0.88. The d (SDdiff) for the comparison of the third walks at assessment 1 and assessment 2 was -0.90 (5.01) seconds. The reliability coefficient was 10.02 and the 95% limits of agreement were -10.92 to +9.12 seconds.

CONCLUSION:

Within-assessment gait speed measured at home is highly reliable. The between-assessment reliability of gait speed measurement is less reliable but comparable with other studies.

PMID:
12017517
DOI:
10.1191/0269215502cr495oa
[Indexed for MEDLINE]
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