Test-retest reliability of the six-minute walking distance measurements using FeetMe insoles by completely unassisted healthy adults in their homes

• Published in: PLOS digital health Vol. 2; no. 11; p. e0000262
• Main Authors: Mostovov, Andrey, Jacobs, Damien, Farid, Leila, Dhellin, Paul, Baille, Guillaume
• Format: Journal Article
• Language: English
• Published: San Francisco Public Library of Science 01.11.2023; Public Library of Science (PLoS)
• Subjects: Age groups; Clinical medicine; Coefficient of variation; Correlation coefficient; Gait; Hospitals; Medical equipment; Multiple sclerosis; Orthopedics; Patients; Smartphones; Surgery; Walking; Wearable computers
• ISSN: 2767-3170; 2767-3170
• DOI: 10.1371/journal.pdig.0000262

Wearable technology provides an opportunity for new ways of monitoring patient gait remotely, through at-home self-administered six-minute walk tests (6MWTs). The purpose of this study was to evaluate the test-retest reliability of FeetMe insoles, a wearable gait assessment device, for measuring the six-minute walking distance (6MWD) during tests conducted with a one-week interval by completely unassisted healthy adults in their homes. Participants (n = 21) performed two 6MWTs at home while wearing the FeetMe insoles, and two 6MWTs at hospital while wearing FeetMe insoles and being assessed by a rater. All assessments were performed with a one-week interval between tests, no assistance was provided to the participants at home. The agreement between the 6MWD measurements made at baseline and at Week 1 was good for all test configurations and was highest for the at-home FeetMe measurements, with an intraclass correlation coefficient (ICC) of 0.95, standard error of the measurement (SEM) of 15.02 m and coefficient of variation (CV) of 3.33%, compared to ICCs of 0.79 and 0.78, SEMs of 25.65 and 26.65 and CVs of 6.24% and 6.10% for the rater and FeetMe measurements at hospital, respectively. Our work demonstrates that the FeetMe system could provide a reliable solution allowing individuals to self-administer 6MWTs independently at home.