IRCCS Fondazione Don Carlo Gnocchi ONLUS, 50143 Firenze, Italy.
Department of Health Sciences and Technology, ETH Zurich, 8092 Zurich, Switzerland.
Sensors (Basel). 2023 Jun 30;23(13):6059. doi: 10.3390/s23136059.
The use of stereophotogrammetry systems is challenging when targeting children's gait analysis due to the time required and the need to keep physical markers in place. For this reason, marker-less photoelectric systems appear to be a solution for accurate and fast gait analysis in youth. The aim of this study is to validate a photoelectric system and its configurations (LED filter setting) on healthy children, comparing the kinematic gait parameters with those obtained from a three-dimensional stereophotogrammetry system. Twenty-seven healthy children were enrolled. Three LED filter settings for the OptoGait were compared to the BTS P6000. The analysis included the non-parametric 80% limits of agreement and the intraclass correlation coefficient (ICC). Additionally, normalised limits of agreement and bias (NLoAs and Nbias) were compared to the clinical experience of physical therapists (i.e., assuming an error lower than 5% is acceptable). ICCs showed excellent consistency for most of the parameters and filter settings; NLoAs varied between 1.39% and 12.62%. An inverse association between the number of LEDs for filter setting and the bias values was also observed. Observations confirm the validity of the OptoGait system for the evaluation of spatiotemporal gait parameters in children.
立体摄影测量系统在针对儿童步态分析时具有挑战性，因为它需要花费时间，并且需要将物理标记物保持在原位。出于这个原因，无标记光电系统似乎是一种用于准确、快速分析青少年步态的解决方案。本研究的目的是验证光电系统及其配置（LED 滤光片设置）在健康儿童身上的有效性，比较运动学步态参数与从三维立体摄影测量系统获得的参数。共纳入 27 名健康儿童。将 OptoGait 的三种 LED 滤光片设置与 BTS P6000 进行比较。分析包括非参数 80%一致性界限和组内相关系数 (ICC)。此外，还将归一化一致性界限和偏差 (NLoAs 和 Nbias) 与物理治疗师的临床经验进行了比较（即，假设低于 5%的误差是可以接受的）。对于大多数参数和滤波器设置，ICC 显示出极好的一致性；NLoAs 变化范围为 1.39%至 12.62%。还观察到滤波器设置的 LED 数量与偏差值之间存在反比关系。这些观察结果证实了 OptoGait 系统在评估儿童时空步态参数方面的有效性。
