Reliability and validity of the long-distance corridor walk among stroke survivors
Shamay S.M. Ng, Tai-Wa Liu, Jack C. Y. Chan, Irene C. W. Chan, Judy C. L. Chu, Henry C. H. Poon, Ashley L. Y. Poon, Cynthia Y.Y. Lai, Mimi M.Y. Tse
Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong (SAR), Hong Kong. E-mail: Shamay.Ng@polyu.edu.hk
Objective: To identify the psychometric properties of the Long-Distance Corridor Walk (LDCW) among community-dwelling stroke survivors.
Subjects: Twenty-five stroke survivors and 25 healthy older adults.
Methods: The LDCW was administered to the 25 stroke survivors on 2 separate days with a 7-day interval. Fugl-Meyer Assessment for the Lower Extremities (FMA-LE), measurement of lower limb muscle strength, Berg Balance Scale (BBS), limit of stability (LOS), Narrow-Corridor Walk Test (NCWT), Timed Up and Go (TUG) test, and the Community Integration Measure—Cantonese version (CIM) were performed on one of the days. The healthy older adults completed the LDCW once, and the results were recorded by a random rater.
Results: The LDCW showed excellent inter-rater reliability and test-retest reliability, and significant correlations with FMA-LE, BBS, TUG, and NCWT. A cut-off score of 127.5 m for the 2-min walk and 426.69 s for the 400-m walk distinguished stroke survivors from healthy older adults. The MDC in the LDCW in the 2-min walk and 400-m walk were 18.69 m and 121.43 s, respectively.
Conclusion: The LDCW is a reliable clinical measurement tool for the assessment of advanced walking capacity in stroke survivors.
The Long-Distance Corridor Walk (LDCW) was originally used to measure the cardiorespiratory fitness of healthy older adults. We proposed that the LDCW could be used to comprehensively measure the advanced walking capacity of stroke survivors and reflect their level of community integration. The present study aims to identify the psychometric properties, including the inter-rater reliability, test-retest reliability and concurrent validity, of the LDCW, using both community-dwelling people with stroke and community-dwelling older adults as control subjects. This study also investigates the performance of LDCW with stroke survivors and healthy older adults, determines the cut-off of LDCW completion times that differentiate stroke survivors from healthy older adults and identifies the minimum detectable change (MDC) of the LDCW. The results showed that the LDCW is a reliable clinical measurement tool for the assessment of advanced walking capacity in stroke survivors.
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