Benchmarking between a Sensorized E-textile Sock for Remote Monitoring and a Stereophotogrammetric System

Despite a significant growth of interest for e-textile wearable devices in the contest of remote monitoring, there is still a lack of knowledge about the agreement between them and their related gold standard. Aim of this study is to investigate the agreement between a sensorized e-textile sock namely SWEET Sock and the stereophotogrammetry considered the “gold standard” in the context of gait analysis. Twenty-nine free walk acquisitions of three healthy subjects instrumented by both systems were recorded. The study of agreement was performed through different statistical approaches: Paired t-test, Bland-Altman Analysis and Passing-Bablok regression. The result showed that there was not a perfect agreement about each spatiotemporal parameter analysed between the two systems. This result should be taken in correct account before using the two different systems in an interchangeable way, for example to evaluate the patients’ rehabilitation outcome in terms of spatiotemporal parameters.