Pusara Apiwan, Heamawatanachai Sumet, Sinsurin Komsak, Jorrakate Chaiyong
Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, Thailand.
Faculty of Engineering, Naresuan University, Phitsanulok, Thailand.
Int Biomech. 2019 Dec;6(1):85-92. doi: 10.1080/23335432.2019.1671221.
The purposes of this study were to develop and evaluate the test-retest reliability of a specific low-cost three-dimensional webcam recording system (3D-WCRS) and compare its reliability to a standard motion analysis system. Twenty healthy volunteers comprised of 5 males and 15 females with a mean age of 22.90 years and mean BMI of 22.72 kg/m were investigated for angles of hip, knee and ankle joints in three planes while walking at a self-selected speed. Intraclass correlation coefficients (ICCs) were used to evaluate as well as compare the test-retest reliability of the 3D-WCRS and standard motion analysis system. Standard error of measurement (SEM) was also analyzed for the purposes of the study. The results exhibited excellent test-retest reliability for the 3D-WCRS (ICCs ranged between 0.93 and 0.99, p = 0.001) in the three joints and planes. The standard motion analysis system demonstrated excellent reliability for all joints and planes (ICCs ranged between 0.99 and 1.00, p = 0.001). Minimal SEM values were observed in both the 3D-WCRS and standard motion analysis systems. Therefore, the developed low-cost 3D-WCRS exhibits good to excellent test-retest reliability. The test-retest reliability of the 3D-WCRS is likely to be comparable to a standard motion analysis system.
本研究的目的是开发并评估一种特定的低成本三维网络摄像头记录系统（3D-WCRS）的重测信度，并将其信度与标准运动分析系统进行比较。对20名健康志愿者（5名男性和15名女性，平均年龄22.90岁，平均BMI为22.72kg/m）在以自选速度行走时的髋关节、膝关节和踝关节在三个平面内的角度进行了研究。组内相关系数（ICC）用于评估并比较3D-WCRS和标准运动分析系统的重测信度。本研究还分析了测量标准误（SEM）。结果显示，3D-WCRS在三个关节和平面上均表现出出色的重测信度（ICC范围在0.93至0.99之间，p = 0.001）。标准运动分析系统在所有关节和平面上均显示出出色的信度（ICC范围在0.99至1.00之间，p = 0.001）。在3D-WCRS和标准运动分析系统中均观察到最小的SEM值。因此，所开发的低成本3D-WCRS表现出良好至出色的重测信度。3D-WCRS的重测信度可能与标准运动分析系统相当。
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