Please use this identifier to cite or link to this item:
Title: Reliability and validity of dual-task mobility assessments in people with chronic stroke
Authors: Yang, L 
He, C
Pang, MYC 
Issue Date: 2016
Publisher: Public Library of Science
Source: PLoS one, 2016, v. 11, no. 1, e0147833 How to cite?
Journal: PLoS one 
Abstract: Background: The ability to perform a cognitive task while walking simultaneously (dual-tasking) is important in real life. However, the psychometric properties of dual-task walking tests have not been well established in stroke.
Objective: To assess the test-retest reliability, concurrent and known-groups validity of various dualtask walking tests in people with chronic stroke.
Design Observational measurement study with a test-retest design.
Methods: Eighty-eight individuals with chronic stroke participated. The testing protocol involved four walking tasks (walking forward at self-selected and maximal speed, walking backward at self-selected speed, and crossing over obstacles) performed simultaneously with each of the three attention-demanding tasks (verbal fluency, serial 3 subtractions or carrying a cup of water). For each dual-task condition, the time taken to complete the walking task, the correct response rate (CRR) of the cognitive task, and the dual-task effect (DTE) for the walking time and CRR were calculated. Forty-six of the participants were tested twice within 3-4 days to establish test-retest reliability.
Results: The walking time in various dual-task assessments demonstrated good to excellent reliability [Intraclass correlation coefficient (ICC2,1) = 0.70-0.93; relative minimal detectable change at 95% confidence level (MDC95%) = 29%-45%]. The reliability of the CRR (ICC2,1 = 0.58-0.81) and the DTE in walking time (ICC2,1 = 0.11-0.80) was more varied. The reliability of the DTE in CRR (ICC2,1 =-0.31-0.40) was poor to fair. The walking time and CRR obtained in various dual-task walking tests were moderately to strongly correlated with those of the dual-task Timed-up-And-Go test, thus demonstrating good concurrent validity. None of the tests could discriminate fallers (those who had sustained at least one fall in the past year) from non-fallers.
Limitation: The results are generalizable to community-dwelling individuals with chronic stroke only.
Conclusions: The walking time derived from the various dual-task assessments generally demonstrated good to excellent reliability, making them potentially useful in clinical practice and future research endeavors. However, the usefulness of these measurements in predicting falls needs to be further explored. Relatively low reliability was shown in the cognitive outcomes and DTE, which may not be preferred measurements for assessing dual-task performance.
EISSN: 1932-6203
DOI: 10.1371/journal.pone.0147833
Rights: © 2016 Yang et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
The following publication: Yang L, He C, Pang MYC (2016) Reliability and Validity of Dual-Task Mobility Assessments in People with Chronic Stroke. PLoS ONE 11(1): e0147833 is available at
Appears in Collections:Journal/Magazine Article

Files in This Item:
File Description SizeFormat 
Yang_Reliability_validity_dual-task.PDF297.19 kBAdobe PDFView/Open
View full-text via PolyU eLinks SFX Query
Show full item record
PIRA download icon_1.1View/Download Contents


Last Week
Last month
Citations as of May 21, 2020


Last Week
Last month
Citations as of May 29, 2020

Page view(s)

Last Week
Last month
Citations as of May 6, 2020


Citations as of May 6, 2020

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.