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The reliability, accuracy and minimal detectable difference of a multi-segment kinematic model of the foot-shoe complex

Bishop, Chris, Paul, Gunther, & Thewlis, Dominic (2013) The reliability, accuracy and minimal detectable difference of a multi-segment kinematic model of the foot-shoe complex. Gait and Posture, 37(4), pp. 552-557.

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Abstract

Kinematic models are commonly used to quantify foot and ankle kinematics, yet no marker sets or models have been proven reliable or accurate when wearing shoes. Further, the minimal detectable difference of a developed model is often not reported. We present a kinematic model that is reliable, accurate and sensitive to describe the kinematics of the foot–shoe complex and lower leg during walking gait. In order to achieve this, a new marker set was established, consisting of 25 markers applied on the shoe and skin surface, which informed a four segment kinematic model of the foot–shoe complex and lower leg. Three independent experiments were conducted to determine the reliability, accuracy and minimal detectable difference of the marker set and model. Inter-rater reliability of marker placement on the shoe was proven to be good to excellent (ICC = 0.75–0.98) indicating that markers could be applied reliably between raters. Intra-rater reliability was better for the experienced rater (ICC = 0.68–0.99) than the inexperienced rater (ICC = 0.38–0.97). The accuracy of marker placement along each axis was <6.7 mm for all markers studied. Minimal detectable difference (MDD90) thresholds were defined for each joint; tibiocalcaneal joint – MDD90 = 2.17–9.36°, tarsometatarsal joint – MDD90 = 1.03–9.29° and the metatarsophalangeal joint – MDD90 = 1.75–9.12°. These thresholds proposed are specific for the description of shod motion, and can be used in future research designed at comparing between different footwear.

Impact and interest:

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ID Code: 49002
Item Type: Journal Article
Keywords: Kinematics, Foot and Ankle Biomechanics, Footwear, Modelling, Shoe
DOI: 10.1016/j.gaitpost.2012.09.020
ISSN: 0966-6362
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Schools > School of Public Health & Social Work
Copyright Owner: Copyright 2012 Elsevier B.V.
Copyright Statement: This is the author’s version of a work that was accepted for publication in the journal, Gait & Posture. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Gait & Posture, Volume 37, Issue 4, April 2013, Pages 552–557. DOI: 10.1016/j.gaitpost.2012.09.020
Deposited On: 08 Mar 2012 08:07
Last Modified: 06 May 2014 03:36

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