Article

The Oxford foot model (OFM) is a multi-segment model for calculating
hindfoot and forefoot motion. Limited information is available regarding the
repeatability and error of this model in adults. Therefore the purpose of this
study was to assess the intra-tester reliability of OFM hindfoot and forefoot
gait kinematics in adults at initial contact (IC) and toe-off (TO). METHODS:
Seventeen healthy adults (age=25.1+/-4.8 years, height=1.75+/-0.10m,
weight=74.0+/-12.4kg) were tested on a single visit, during which 1 examiner
recorded 2 sessions. For each session, 10 walking trials were recorded using a
12-camera motion analysis system (Vicon, Oxford, UK). Markers were removed and
re-applied between sessions. Dynamic hindfoot and forefoot angles were calculated
both with and without referencing to neutral stance (assuming neutral stance
angles are zero in all planes). Using the 10 trial average, intraclass
correlation coefficients (ICC(2,k)) and standard errors of the measurement were
calculated for each reference condition, anatomical plane, and joint (hindfoot,
forefoot). RESULTS: Referencing to neutral stance resulted in good reliability
(ICC>/=0.83) and small error (</=2.45 degrees ) for hindfoot and forefoot angle
in all planes. Without referencing to neutral stance, sagittal and transverse
plane reliability were also good (ICC>/=0.90) and error small (</=3.14 degrees );
however, frontal plane reliability was poor (ICC</=0.77), with large error
(>/=4.86 degrees ).
DISCUSSION: Our results show that overall the OFM is reliable
during adult gait. Reliability for adults is higher than previously reported in
children. Referencing joint angles to neutral stance decreased error by up to 2
degrees from previous reports.
CI - Copyright (c) 2010 Elsevier B.V. All rights reserved.

Langue : ANGLAIS