Benchmarking between two wearable inertial systems for gait analysis based on a different sensor placement using several statistical approaches

•Wearable inertial systems for gait analysis are spreading in clinical practice.•Opal and G-Walk Systems are based on a different sensor placement.•Validity and repeatability studies of measurement systems are of paramount importance.•Benchmarking analysis is fundamental for meta-analysis and multic...

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Bibliographic Details
Published in:Measurement : journal of the International Measurement Confederation 2021-03, Vol.173, p.108642, Article 108642
Main Authors: Donisi, Leandro, Pagano, Gaetano, Cesarelli, Giuseppe, Coccia, Armando, Amitrano, Federica, D'Addio, Giovanni
Format: Article
Language:English
Subjects:
Agreement
Biomechanics
Correlation analysis
Correlation coefficients
Gait
Gait analysis
IMUs
Placement
Regression analysis
Repeatability
Reproducibility
Sensors
Statistical analysis
Systems analysis
Wearable computers
Wearable devices
Wearable technology
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Summary:•Wearable inertial systems for gait analysis are spreading in clinical practice.•Opal and G-Walk Systems are based on a different sensor placement.•Validity and repeatability studies of measurement systems are of paramount importance.•Benchmarking analysis is fundamental for meta-analysis and multicenter studies.•Benchmarking was studied by Bland-Altman, Passing-Bablok regression, T-Test and ICC. Despite the growing use of different wearable inertial systems for gait analysis in clinical setting, also based on a different sensor placement, there is still a lack of knowledge about the agreement between them and their repeatability. The purpose of this study is to investigate the agreement between two commercial wearable inertial systems for gait analysis: Opal and G-Walk Systems, and their repeatability. Fifty-three subjects, healthy and pathological, underwent a gait analysis session instrumented by both systems, seven spatiotemporal parameters were recorded. The study of agreement was carried out through Bland-Altman Analysis, Passing-Bablok regression and Paired t-test, the study of repeatability through the intra class correlation coefficient ICC(3,1). Study results showed a not perfect agreement between the two systems although they both showed good repeatability. This work underlines the importance to perform a study of agreement before using devices interchangeably or even as a replacement in order to have reliable measurements.
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2020.108642