title: Test-Retest Reliability of an Automated Infrared-Assisted Trunk Accelerometer-Based Gait Analysis System.
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.
authors.affiliation: Department of Rehabilitation Medicine, Ten-Chan General Hospital, No. 155, Yanping Rd., Zhongli Dist., Taoyuan City 320, Taiwan. f927kimo@gmail.com.|Department of Biomedical Engineering, Chung Yuan Christian University, No. 200, Zhongbei Rd., Zhongli Dist., Taoyuan City 320, Taiwan. f927kimo@gmail.com.
authors.forename: Chia-Yu
authors.initials: CY
authors.lastname: Hsu
authors.affiliation: Department of Biomedical Engineering, Chung Yuan Christian University, No. 200, Zhongbei Rd., Zhongli Dist., Taoyuan City 320, Taiwan. yuhshow@cycu.edu.tw.
authors.forename: Yuh-Show
authors.initials: YS
authors.lastname: Tsai
authors.affiliation: Department of Biomedical Engineering, Chung Yuan Christian University, No. 200, Zhongbei Rd., Zhongli Dist., Taoyuan City 320, Taiwan. specially527@gmail.com.
authors.forename: Cheng-Shiang
authors.initials: CS
authors.lastname: Yau
authors.affiliation: Department of Physiotherapy, Ten-Chan General Hospital, No. 155, Yanping Rd., Zhongli Dist., Taoyuan City 320, Taiwan. milla1220@yahoo.com.tw.
authors.forename: Hung-Hai
authors.initials: HH
authors.lastname: Shie
authors.affiliation: Department of Rehabilitation Medicine, Ten-Chan General Hospital, No. 155, Yanping Rd., Zhongli Dist., Taoyuan City 320, Taiwan. drwjm@yahoo.com.tw.
authors.forename: Chu-Ming
authors.initials: CM
authors.lastname: Wu
mesh_terms: D061725:Accelerometry / Q000295:instrumentation / Q000379:methods*; D000328:Adult; D000368:Aged; D001696:Biomechanical Phenomena; D005260:Female; D005684:Gait / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods*; D004856:Postural Balance / Q000502:physiology; D016138:Walking / Q000502:physiology*
keywords: accelerometry; gait; infrared; reliability; trunk acceleration