Macleod Catherine A, Conway Bernard A, Allan David B, Galen Sujay S
Biomedical Engineering, University of Strathclyde, Glasgow, UK; Scottish Centre for Innovation in Spinal Cord Injury (SCISCI), Queen Elizabeth National Spinal Injuries Unit, Southern General Hospital, Glasgow, UK.
Scottish Centre for Innovation in Spinal Cord Injury (SCISCI), Queen Elizabeth National Spinal Injuries Unit, Southern General Hospital, Glasgow, UK.
Med Eng Phys. 2014 Apr;36(4):541-6. doi: 10.1016/j.medengphy.2013.11.011. Epub 2013 Dec 15.
Performing gait analysis in a clinical setting can often be challenging due to time, cost and the availability of sophisticated three-dimensional (3D) gait analysis systems. This study has developed and tested a portable wireless gait assessment tool (wi-GAT) to address these challenges.
To investigate the concurrent validity of the wi-GAT in measuring spatio-temporal gait parameters such as stride length, stride duration, cadence, double support time (DST), stance and swing time compared to a 3D Vicon motion analysis system.
Ten healthy volunteers participated in the study (age range 23-30 years). Spatio-temporal gait parameters were recorded simultaneously by the Vicon and the wi-GAT systems as each subject walked at their self-selected speed.
The stride length and duration, cadence, stance duration and walking speed recorded using the wi-GAT showed strong agreement with those same parameters recorded by the Vicon (ICC of 0.94-0.996). A difference between the systems in registering "toe off" resulted in less agreement (ICC of 0.299-0.847) in gait parameters such as %stance and %swing and DST.
The study demonstrated good concurrent validity for the wi-GAT system. The wi-GAT has the potential to be a useful assessment tool for clinicians.
在临床环境中进行步态分析往往具有挑战性，这是由于时间、成本以及复杂的三维（3D）步态分析系统的可用性等因素。本研究开发并测试了一种便携式无线步态评估工具（wi-GAT），以应对这些挑战。
与三维Vicon运动分析系统相比，研究wi-GAT在测量时空步态参数（如步长、步幅持续时间、步频、双支撑时间（DST）、站立时间和摆动时间）方面的同时效度。
10名健康志愿者参与了该研究（年龄范围23 - 30岁）。当每个受试者以自己选择的速度行走时，Vicon系统和wi-GAT系统同时记录时空步态参数。
使用wi-GAT记录的步长、步幅持续时间、步频、站立持续时间和步行速度与Vicon记录的相同参数显示出高度一致性（组内相关系数为0.94 - 0.996）。两个系统在记录“足趾离地”方面的差异导致在诸如站立百分比、摆动百分比和双支撑时间等步态参数上的一致性较低（组内相关系数为0.299 - 0.847）。
该研究证明了wi-GAT系统具有良好的同时效度。wi-GAT有潜力成为临床医生有用的评估工具。
