Validation and reliability testing of a new, fully integrated gait analysis insole


Background A new tool (OpenGo, Moticon GmbH) was introduced to continuously measure kinetic and
temporospatial gait parameters independently through an insole over up to 4 weeks. The goal of this study was to
investigate the validity and reliability of this new insole system in a group of healthy individuals.
Methods Gait data were collected from 12 healthy individuals on a treadmill at two different speeds. In total, six
trials of three minutes each were performed by every participant. Validation was performed with the FDM-S System
(Zebris). Complete sensor data were used for a within test reliability analysis of over 10000 steps. Intraclass
correlation was calculated for different gait parameters and analysis of variance performed.
Results Intraclass correlation for the validation was >0.796 for temporospatial and kinetic gait parameters. No
statistical difference was seen between the insole and force plate measurements (difference between means:
36.3 ± 27.19 N; p = 0.19 and 0.027 ± 0.028 s; p = 0.36). Intraclass correlation for the reliability was >0.994 for all
parameters measured.
Conclusion The system is feasible for clinical trials that require step by step as well as grouped analysis of gait over a
long period of time. Comparable validity and reliability to a stationary analysis tool has been shown.


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