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Authors: Mohamed Boutaayamou 1 ; Sophie Gillain 2 ; Cédric Schwartz 3 ; Vincent Denoël 3 ; Jean Petermans 2 ; Jean-Louis Croisier 3 ; Bénédicte Forthomme 3 ; Jacques G. Verly 4 ; Olivier Brüls 3 and Gaëtan Garraux 4

Affiliations: 1 University of Liège (ULiège) and ULiège, Belgium ; 2 University Hospital Center of Liège, Belgium ; 3 University of Liège (ULiège), Belgium ; 4 ULiège, Belgium

ISBN: 978-989-758-279-0

Keyword(s): Validated Extraction, Refined Gait Parameters, Gait Sub-Phase Durations, Foot-Worn Accelerometers, Older Adults, Signal Processing.

Related Ontology Subjects/Areas/Topics: Applications and Services ; Biomedical Engineering ; Biomedical Signal Processing ; Computer Vision, Visualization and Computer Graphics ; Detection and Identification ; Devices ; Health Information Systems ; Human-Computer Interaction ; Medical Image Detection, Acquisition, Analysis and Processing ; Physiological Computing Systems ; Wearable Sensors and Systems

Abstract: Validated extraction of gait sub-phase durations using an ambulatory accelerometer-based system is a current unmet need to quantify subtle changes during the walking of older adults. In this paper, we describe (1) a signal processing algorithm to automatically extract not only durations of stride, stance, swing, and double support phases, but also durations of sub-phases that refine the stance and swing phases from foot-worn accelerometer signals in comfortable walking of older adults, and (2) the validation of this extraction using reference data provided by a gold standard system. The results show that we achieve a high agreement between our method and the reference method in the extraction of (1) the temporal gait events involved in the estimation of the phase/sub-phase durations, namely heel strike (HS), toe strike (TS), toe-off (TO), maximum of heel clearance (MHC), and maximum of toe clearance (MTC), with an accuracy and precision that range from ‒3.6 ms to 4.0 ms, and 6.5 ms to 12.0 ms, respectively, and (2) the gait phase/sub-phase durations, namely stride, stance, swing, double support phases, and HS to TS, TO to MHC, MHC to MTC, and MTC to HS sub-phases, with an accuracy and precision that range from ‒4 ms to 5 ms, and 9 ms to 15 ms, respectively, in comfortable walking of a thirty-eight older adults ( (mean ± standard deviation) 71.0 ± 4.1 years old). This demonstrates that the developed accelerometer-based algorithm can extract validated temporal gait events and phase/sub-phase durations, in comfortable walking of older adults, with a promising degree of accuracy/precision compared to reference data, warranting further studies. (More)

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Paper citation in several formats:
Boutaayamou, M.; Gillain, S.; Schwartz, C.; Denoël, V.; Petermans, J.; Croisier , J.; Forthomme, B.; Verly, J.; Brüls, O. and Garraux, G. (2018). Validated Assessment of Gait Sub-Phase Durations in Older Adults using an Accelerometer-based Ambulatory System.In Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 4 BIOSIGNALS: BIOSIGNALS, ISBN 978-989-758-279-0, pages 248-255. DOI: 10.5220/0006716202480255

@conference{biosignals18,
author={Mohamed Boutaayamou. and Sophie Gillain. and Cédric Schwartz. and Vincent Denoël. and Jean Petermans. and Jean{-}Louis Croisier . and Bénédicte Forthomme. and Jacques G. Verly. and Olivier Brüls. and Gaëtan Garraux.},
title={Validated Assessment of Gait Sub-Phase Durations in Older Adults using an Accelerometer-based Ambulatory System},
booktitle={Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 4 BIOSIGNALS: BIOSIGNALS,},
year={2018},
pages={248-255},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0006716202480255},
isbn={978-989-758-279-0},
}

TY - CONF

JO - Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 4 BIOSIGNALS: BIOSIGNALS,
TI - Validated Assessment of Gait Sub-Phase Durations in Older Adults using an Accelerometer-based Ambulatory System
SN - 978-989-758-279-0
AU - Boutaayamou, M.
AU - Gillain, S.
AU - Schwartz, C.
AU - Denoël, V.
AU - Petermans, J.
AU - Croisier , J.
AU - Forthomme, B.
AU - Verly, J.
AU - Brüls, O.
AU - Garraux, G.
PY - 2018
SP - 248
EP - 255
DO - 10.5220/0006716202480255

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