@article{ref1,
title="Determining the utility of a smartphone-based gait evaluation for possible use in concussion management",
journal="Physician and sportsmedicine",
year="2019",
author="Howell, David R. and Lugade, Vipul and Taksir, Mikhail and Meehan, William P.",
volume="ePub",
number="ePub",
pages="1-6",
abstract="<b>Objectives</b>: Our was objectives were to (1) assess the validity of a smartphone-based application to obtain spatiotemporal gait variables relative to an established movement monitoring system used previously to evaluate post-concussion gait, and (2) determine the test-retest reliability of gait variables obtained with a smartphone. <b>Methods</b>: Twenty healthy participants (n=14 females, mean age=22.2, SD=2.1 years) were assessed at two time points, approximately two weeks apart. Two measurement systems (inertial sensor system, smartphone application) acquired and analyzed single-task and dual-task spatio-temporal gait variables simultaneously. Our primary outcome measures were average walking speed (m/s), cadence (steps/min), and stride length (m) measured by the inertial sensor system and smartphone application. <b>Results</b>: Correlations between the systems were high to very high (Pearson r=0.77-0.98) at both time points, with the exception of dual-task stride length at time 2 (Pearson r=0.55). Bland-Altman plots for average gait speed and cadence indicated the average disagreement between systems was close to zero, suggesting little evidence for systematic bias between acquisition systems. Test-retest consistency measures using the smartphone revealed high to very high reliability for all measurements (ICC=0.81-0.95). <b>Conclusions</b>: Our results indicate that sensors within a smartphone are capable of measuring spatio-temporal gait variables similar to a validated three-sensor inertial sensor system in single-task and dual-task conditions, and that data are reliable across a two-week time interval. A smartphone-based application might allow clinicians to objectively evaluate gait in the management of concussion with high ease-of-use and a relatively low financial burden.<p /> <p>Language: en</p>",
language="en",
issn="0091-3847",
doi="10.1080/00913847.2019.1632155",
url="http://dx.doi.org/10.1080/00913847.2019.1632155"
}