Neuromuscular Research Laboratory, Schulthess Clinic, Zurich, Switzerland.
Med Eng Phys. 2013 Apr;35(4):500-4. doi: 10.1016/j.medengphy.2012.06.015. Epub 2012 Jul 18.
The purpose of this study was to evaluate the discriminant and concurrent (criterion-related) validity of a recently introduced floor-based photocell system (Optogait, Microgate, Bolzano, Italy) with a validated electronic walkway for the assessment of spatiotemporal gait parameters. Fifteen patients (mean age±standard deviation: 65±7 years) with total knee arthroplasty and 15 healthy matched control subjects were asked to walk at different velocities while gait variables were recorded simultaneously by the two instruments. The Optogait and the criterion instrument detected the same differences in walking parameters between patients and controls. Intraclass correlation coefficients ranged between 0.933 (swing time) and 0.999 (cycle time, cadence and walking speed). Cycle time and stance time were significantly longer, while swing time, step length, cadence and walking speed were significantly lower for Optogait (p<0.001) compared to the criterion instrument. The Optogait system demonstrated high discriminant and concurrent validity with an electronic walkway for the assessment of spatiotemporal gait parameters in orthopedic patients and healthy controls. However, the two measuring instruments cannot be used interchangeably for quantitative gait analysis, and further validation of floor-based photocell technology is warranted.
本研究旨在评估一种新的基于地面的光电系统（Optogait，Microgate，Bolzano，意大利）与经过验证的电子步道在评估时空步态参数方面的判别和同时（效标相关）有效性。我们要求 15 名全膝关节置换患者（平均年龄±标准差：65±7 岁）和 15 名健康匹配的对照组在不同速度下行走，同时由两种仪器记录步态变量。Optogait 和标准仪器检测到患者和对照组之间行走参数的相同差异。组内相关系数范围在 0.933（摆动时间）至 0.999（周期时间、步频和行走速度）之间。与标准仪器相比，Optogait 的周期时间和站立时间明显更长，而摆动时间、步长、步频和行走速度明显更低（p<0.001）。Optogait 系统与电子步道在评估骨科患者和健康对照组的时空步态参数方面具有较高的判别和同时有效性。然而，这两种测量仪器不能互换用于定量步态分析，需要进一步验证基于地面的光电技术。
