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Sensors 2016, 16(8), 1156; doi:10.3390/s16081156

Test-Retest Reliability of an Automated Infrared-Assisted Trunk Accelerometer-Based Gait Analysis System

1
Department of Rehabilitation Medicine, Ten-Chan General Hospital, No. 155, Yanping Rd., Zhongli Dist., Taoyuan City 320, Taiwan
2
Department of Biomedical Engineering, Chung Yuan Christian University, No. 200, Zhongbei Rd., Zhongli Dist., Taoyuan City 320, Taiwan
3
Department of Physiotherapy, Ten-Chan General Hospital, No. 155, Yanping Rd., Zhongli Dist., Taoyuan City 320, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Daniel Teichmann
Received: 19 May 2016 / Revised: 16 July 2016 / Accepted: 21 July 2016 / Published: 23 July 2016
(This article belongs to the Special Issue Wearable Biomedical Sensors)
View Full-Text   |   Download PDF [2143 KB, uploaded 25 July 2016]   |  

Abstract

The aim of this study was to determine the test-retest reliability of an automated infrared-assisted, trunk accelerometer-based gait analysis system for measuring gait parameters of healthy subjects in a hospital. Thirty-five participants (28 of them females; age range, 23–79 years) performed a 5-m walk twice using an accelerometer-based gait analysis system with infrared assist. Measurements of spatiotemporal gait parameters (walking speed, step length, and cadence) and trunk control (gait symmetry, gait regularity, acceleration root mean square (RMS), and acceleration root mean square ratio (RMSR)) were recorded in two separate walking tests conducted 1 week apart. Relative and absolute test-retest reliability was determined by calculating the intra-class correlation coefficient (ICC3,1) and smallest detectable difference (SDD), respectively. The test-retest reliability was excellent for walking speed (ICC = 0.87, 95% confidence interval = 0.74–0.93, SDD = 13.4%), step length (ICC = 0.81, 95% confidence interval = 0.63–0.91, SDD = 12.2%), cadence (ICC = 0.81, 95% confidence interval = 0.63–0.91, SDD = 10.8%), and trunk control (step and stride regularity in anterior-posterior direction, acceleration RMS and acceleration RMSR in medial-lateral direction, and acceleration RMS and stride regularity in vertical direction). An automated infrared-assisted, trunk accelerometer-based gait analysis system is a reliable tool for measuring gait parameters in the hospital environment. View Full-Text
Keywords: accelerometry; gait; infrared; trunk acceleration; reliability accelerometry; gait; infrared; trunk acceleration; reliability
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MDPI and ACS Style

Hsu, C.-Y.; Tsai, Y.-S.; Yau, C.-S.; Shie, H.-H.; Wu, C.-M. Test-Retest Reliability of an Automated Infrared-Assisted Trunk Accelerometer-Based Gait Analysis System. Sensors 2016, 16, 1156.

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