Evaluation of Gait Parameters Determined by InvestiGAIT against a Reference System

Katja Orlowski, Harald Loose, Falko Eckardt, Jürgen Edelmann-Nusser, Kerstin Witte

2016

Abstract

The purpose is to investigate the validity of an inertial-sensor based gait analysis system (InvestiGAIT) consisting of off-the-shelf sensors and an in-house capturing and analyzing software. The gait of five persons with transfermoral limb loss were captured with the inertial system (Shimmer sensors) and the motion capture system (Vicon) integrating two force plates chosen as reference system in this study. Eleven gait parameters are determined from the data of the captured gait sequences. These gait parameters were compared descriptively and statistically using boxplots, Bland-Altman-plots, including the mean of difference (MOD) and the limits of agreement (LoA), the standard error of the mean (SEM), the Wilcoxon test and the Pearson’s correlation coefficient. A complete validity of the gait parameters was not assumed due to the different measurement methods and the impact of the IMU sensor attachment (on the lower shank above the ankle). For the sound and the amputated leg four gait parameters show no significant difference (stride duration, cadence, velocity, stride length). All the other parameters have a p-value smaller than 0.05. Most of the gait parameters have a small MOD, SEM and LoA. These values show a very small absolute difference between the gait parameters of both systems. Based on the results the InvestiGAIT system can be assumed as valid and suitable for follow-up investigations of human gait in research projects or the clinical environment. Nevertheless, further investigations with healthy subjects and a sensor attachment on the subjects’ shoe are planned.

Paper Citation

in Harvard Style

Orlowski K., Loose H., Eckardt F., Edelmann-Nusser J. and Witte K. (2016). Evaluation of Gait Parameters Determined by InvestiGAIT against a Reference System . In Proceedings of the 9th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 4: BIOSIGNALS, (BIOSTEC 2016) ISBN 978-989-758-170-0, pages 256-262. DOI: 10.5220/0005783502560262

in Bibtex Style

@conference{biosignals16,
author={Katja Orlowski and Harald Loose and Falko Eckardt and Jürgen Edelmann-Nusser and Kerstin Witte},
title={Evaluation of Gait Parameters Determined by InvestiGAIT against a Reference System},
booktitle={Proceedings of the 9th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 4: BIOSIGNALS, (BIOSTEC 2016)},
year={2016},
pages={256-262},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005783502560262},
isbn={978-989-758-170-0},
}

in EndNote Style

TY - CONF
JO - Proceedings of the 9th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 4: BIOSIGNALS, (BIOSTEC 2016)
TI - Evaluation of Gait Parameters Determined by InvestiGAIT against a Reference System
SN - 978-989-758-170-0
AU - Orlowski K.
AU - Loose H.
AU - Eckardt F.
AU - Edelmann-Nusser J.
AU - Witte K.
PY - 2016
SP - 256
EP - 262
DO - 10.5220/0005783502560262