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http://dx.doi.org/10.15268/ksim.2021.9.4.291

The Reliability and Validity of Smart Insole for Balance and Gait Analysis  

Lee, Byoung-Kwon (Dept. of Physical Therapy, Konyang University)
Han, Dong-Wook (Dept. of Physical Therapy, Silla University)
Kim, Chang-Young (Dept. of Pharmaceutical and Bio-Pharmaceutical Industry, Korea Health Industry Development Institute)
Kim, Gi-Young (Korea Testing Laboratory)
Park, Dae-Sung (Dept. of Physical Therapy, Konyang University)
Publication Information
Journal of The Korean Society of Integrative Medicine / v.9, no.4, 2021 , pp. 291-298 More about this Journal
Abstract
Purpose: The Pedisole is a newly developed shoe-mounted wearable assessment system for analyzing balance and gait. This study aimed to determine the reliability and validity of the parameters provided by the system for static balance and gait analysis of healthy adults. Methods: This study included 38 healthy adults (22.4±1.9 years) with no history of injury in the lower limbs. All participants were asked to perform balance and gait tasks for undertaking measurements. For analysis of balance, both the smart Pedisole and Pedoscan systems were concurrently used to analyze the path length of the center of pressure (COP) and the weight ratio of the left and right for 10 s. Gait was measured using the smart Pedisole and GaitRite walkway systems simultaneously. The participants walked at a self-selected preferred gait speed. The cadence, stance time, swing time, and step time were used to analyze gait characteristics. Using the paired t-test, the intra-class coefficient correlation (ICC) was calculated for reliability. The Spearman correlation was used to assess the validity of the measurements. In total, data for balance from 36 participants and the gait profiles of 37 participants were evaluated. Results: There were significant differences between the COP path lengths (p<.050) derived from the two systems, and a significant correlation was found for COP path length (r=.382~.523) for static balance. The ICC for COP path length and weight ratio was found to be greater than .687, indicating moderate agreement in balance parameters. The ICC of gait parameters was found to be greater than .697 except for stance time, and there was significant correlation (r=.678~.922) with the GaitRite system. Conclusion: The newly developed smart insole-type Pedisole system and the related application are useful, reliable, and valid tools for balance and gait analysis compared to the gold standard Pedoscan and the GaitRite systems in healthy individuals.
Keywords
balance; gait analysis; reliability; smart insole; test-retest; validity;
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