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Intra-rater repeatability of gait parameters in healthy adults during self-paced treadmill-based virtual reality walking

Al-Amri, Mohammad, Al Balushi, Hilal and Mashabi, Abdulrhman 2017. Intra-rater repeatability of gait parameters in healthy adults during self-paced treadmill-based virtual reality walking. Computer Methods in Biomechanics and Biomedical Engineering 20 (16) , pp. 1669-1677. 10.1080/10255842.2017.1404994

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Abstract

Self-paced treadmill walking is becoming increasingly popular for the gait assessment and re-education, in both research and clinical settings. Its day-to-day repeatability is yet to be established. This study scrutinised the test-retest repeatability of key gait parameters, obtained from the Gait Real-time Analysis Interactive Lab (GRAIL) system. Twenty-three male able-bodied adults (age: 34.56 ± 5.12 years) completed two separate gait assessments on the GRAIL system, separated by 5 ± 3 days. Key gait kinematic, kinetic, and spatial-temporal parameters were analysed. The Intraclass-Correlation Coefficients (ICC), Standard Error Measurement (SEM), Minimum Detectable Change (MDC), and the 95% limits of agreements were calculated to evaluate the repeatability of these gait parameters. Day-to-day agreements were excellent (ICCs > 0.87) for spatial-temporal parameters with low MDC and SEM values, <0.153 and <0.055, respectively. The repeatability was higher for joint kinetic than kinematic parameters, as reflected in small values of SEM (<0.13 Nm/kg and <3.4°) and MDC (<0.335 Nm/kg and <9.44°). The obtained values of all parameters fell within the 95% limits of agreement. Our findings demonstrate the repeatability of the GRAIL system available in our laboratory. The SEM and MDC values can be used to assist researchers and clinicians to distinguish ‘real’ changes in gait performance over time.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Healthcare Sciences
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Uncontrolled Keywords: Reliability; instrumented treadmill; gait analysis;GRAIL; self-paced walking;Intra-rater repeatability;
Publisher: Taylor & Francis
ISSN: 1025-584
Related URLs:
Date of First Compliant Deposit: 23 November 2017
Date of Acceptance: 10 November 2017
Last Modified: 06 Dec 2017 16:05
URI: http://orca.cf.ac.uk/id/eprint/107017

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