Jeong Myeong Geun, Kim Jeongmin, Lee Yongkoo, Kim Kyoung Tae
Department of Rehabilitation Medicine, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, Republic of Korea.
Daegu Research Center for Medical Devices and Green Energy, Korea Institute of Machinery and Materials, Republic of Korea.
Gait Posture. 2024 Oct;114:8-13. doi: 10.1016/j.gaitpost.2024.08.077. Epub 2024 Aug 28.
Gait analysis is essential for evaluating locomotor function and fall risk, particularly in the elderly and in various musculoskeletal disorders. Traditional gait analysis systems face challenges such as technical difficulties, high cost, and complexity of use. Therefore, there is a need for a more accessible and cost-effective system with a wider clinical applicability.
This study aimed to validate the newly developed IB-gait® system (InBody, Republic of Korea), a camera-based gait analysis tool, by comparing it against the VICON system.
A total of 28 community-dwelling adults without gait abnormalities (mean age 24.9 years) were enrolled in this study. The participants underwent gait analysis at their self-selected speed using VICON and IB-gait® simultaneously. Nine spatiotemporal gait parameters, including stride length (m), step length (m), stride duration (s), double-limb duration (s), stance phase (s), swing phase (s), cadence (velocity × 120/stride length), and gait velocity (m/s) were measured. The agreement between the two systems was tested using Bland-Altman plots and intraclass correlation coefficients (ICC).
The IB-gait® showed a high degree of agreement with the VICON system in most gait parameters. The ICC showed excellent reliability for stride length (0.97), step length (0.92), gait velocity (0.97), cadence (0.97), and stride duration (0.79). However, it showed lower reliability in time-based parameters, including double-limb duration (0.12), stance phase (0.54), swing phase (0.241), and stance/swing phase ratio (0.11).
The IB-gait® system appears to be a feasible and cost-effective alternative to VICON system for gait analysis, particularly showing a high level of agreement in the distance-based parameters. Its practicality in clinical settings makes it a valuable tool for widespread use in gait analysis. However, further refinement of time-based parameter measurements and validation in diverse patient populations are needed to enhance its applicability.
步态分析对于评估运动功能和跌倒风险至关重要，尤其是在老年人以及各种肌肉骨骼疾病患者中。传统的步态分析系统面临技术难题、成本高昂和使用复杂等挑战。因此，需要一种更易于使用且成本效益更高、具有更广泛临床适用性的系统。
本研究旨在通过将新开发的基于摄像头的步态分析工具IB-gait®系统（韩国InBody公司）与VICON系统进行比较，来验证该系统。
本研究共纳入28名无步态异常的社区居住成年人（平均年龄24.9岁）。参与者以自己选择的速度同时使用VICON和IB-gait®系统进行步态分析。测量了九个时空步态参数，包括步幅长度（米）、步长（米）、步幅持续时间（秒）、双支撑持续时间（秒）、站立期（秒）、摆动期（秒）、步频（速度×120/步幅长度）和步态速度（米/秒）。使用Bland-Altman图和组内相关系数（ICC）测试了两个系统之间的一致性。
IB-gait®系统在大多数步态参数上与VICON系统显示出高度一致性。ICC显示步幅长度（0.97）、步长（0.92）、步态速度（0.97）、步频（0.97）和步幅持续时间（0.79）具有出色的可靠性。然而，它在基于时间的参数上显示出较低的可靠性，包括双支撑持续时间（0.12）、站立期（0.54）、摆动期（0.241）和站立期/摆动期比值（0.11）。
IB-gait®系统似乎是用于步态分析的VICON系统的一种可行且具有成本效益的替代方案，特别是在基于距离的参数上显示出高度一致性。其在临床环境中的实用性使其成为步态分析中广泛使用的有价值工具。然而，需要进一步改进基于时间的参数测量并在不同患者群体中进行验证，以提高其适用性。
