Becerro de Bengoa Vallejo Ricardo, Losa Iglesias Marta Elena, Zeni Joseph, Thomas Stephen
Escuela Universitaria de Enfermería, Fisioterapia, y Podología, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain.
J Am Podiatr Med Assoc. 2013 May-Jun;103(3):197-203. doi: 10.7547/1030197.
Abnormal plantar pressures are the hallmark characteristic of several conditions and pathologic abnormalities. Pressure platforms allow for quick and accurate screening of patients and help guide clinical treatment. However, it is essential to evaluate the reliability and repeatability of these devices before making clinical decisions. The purpose of this study was to determine the reliability of the EPS-Platform during static and dynamic activities.
Fifty-six healthy individuals stood and walked onto the pressure platform. Five trials were performed during two separate testing sessions to determine intrasession and intersession reliability. Pressure data were obtained and several variables of interest were calculated for intrasession and intersession reliability using intraclass correlation coefficients (ICCs), SEM, percent error, and coefficient of variation.
Static and dynamic intrasession and intersession reliability produced moderate-to-excellent ICCs, low SEMs, low percent errors, and low coefficients of variation. Static trials had higher ICCs, lower percent errors, and lower coefficients of variation compared with dynamic trials. Intersession reliability also had higher ICCs, lower percent errors, and lower coefficients of variation compared with intrasession reliability.
This study demonstrates that the EPS-Platform is a reliable device for collecting gait plantar pressures. Static trials produce better reliability, most likely owing to the large inherent variability during dynamic gait. Intersession reliability was higher than intrasession reliability owing to the intersession measures being calculated with an average of five trials. By averaging the trials, the variability of gait is decreased, and this improves the accuracy of the results. These results can be used as the basis for future studies and to determine a priori sample sizes for investigations that use the EPS-Platform.
足底压力异常是多种病症和病理异常的标志性特征。压力平台可实现对患者的快速准确筛查，并有助于指导临床治疗。然而，在做出临床决策之前，评估这些设备的可靠性和可重复性至关重要。本研究的目的是确定EPS平台在静态和动态活动期间的可靠性。
56名健康个体站立并走上压力平台。在两个独立的测试环节中进行了五次试验，以确定组内和组间的可靠性。获取压力数据，并使用组内相关系数（ICC）、标准误（SEM）、误差百分比和变异系数计算组内和组间可靠性的几个感兴趣的变量。
静态和动态的组内及组间可靠性产生了中等至优秀的ICC、低SEM、低误差百分比和低变异系数。与动态试验相比，静态试验具有更高的ICC、更低的误差百分比和更低的变异系数。与组内可靠性相比，组间可靠性也具有更高的ICC、更低的误差百分比和更低的变异系数。
本研究表明，EPS平台是一种用于收集步态足底压力的可靠设备。静态试验产生更好的可靠性，这很可能是由于动态步态期间存在较大的固有变异性。组间可靠性高于组内可靠性，这是因为组间测量是通过五次试验的平均值计算得出的。通过对试验求平均值，步态的变异性降低，从而提高了结果的准确性。这些结果可作为未来研究的基础，并用于确定使用EPS平台的研究的先验样本量。
