Article

OBJECTIVE: To determine the responsiveness to change of spatial-temporal gait
parameters among stroke survivors for 3 different variability measures: SD,
coefficient of variation (CV), and median absolute deviation (MAD). DESIGN:
Retrospective chart review. SETTING: Clinical laboratory in a Canadian hospital.
PARTICIPANTS: Stroke survivors (N=74) receiving inpatient rehabilitation.
INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Spatial-temporal gait
variability was calculated for step length, step width, stance time, swing time,
and double support time. Responsiveness to change was determined by comparing (1)
trials without versus trials with a concurrent cognitive task and (2) admission
to discharge from rehabilitation. RESULTS: Variability estimators (SD, CV, and
MAD) increased with the addition of a cognitive task and decreased from admission
to discharge of rehabilitation. However, these changes were not statistically
significant when change in gait velocity was included as a covariate. The effect
size values were similar for all variability estimators with a trend toward a
greater SD response to temporal parameters. The CV displayed a larger response to
change for step length than did the SD and MAD. Although gait variability
decreased between admission and discharge, the effect size was larger for the
condition without the cognitive task than for the condition with the cognitive
task. CONCLUSIONS: Our results show that gait variability estimators demonstrate
a similar responsiveness to a concurrent cognitive task and improved walking
ability with recovery from stroke. Future work may focus on evaluating the
clinical utility of these measures in relation to informing therapy and response
to gait-specific training protocols.
CI - Copyright (c) 2014 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS