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A reliability study of biomechanical foot function in psoriatic arthritis based on a novel multi-segmented foot model

By E. Hyslop, J. Woodburn, I.B. McInnes, R. Semple, L. Newcombe, G. Hendry, D. Rafferty, S. De Mits and D.E. Turner


The objective of this study was to determine the within-and between-day reliability of spatio-temporal plantar pressure kinematic and kinetic measurements based on a novel seven segment foot model applied in patients with Psoriatic Arthritis (PsA) Nine PsA patients and matched healthy adult controls underwent three-dimensional gait analysis on two occasions one week apart using a seven segment foot model A core-set of functional variables including inter-segment kinematics kinetics spatio-temporal and plantar pressure distribution were analysed using the coefficient of multiple correlation (CMC) Bland-Altman plots intraclass correlation coefficients (ICC) and the standard error of measurement (SEM) Results showed excellent within- and between-day reliability for intersegment kinematic and kinetic data patterns with CMC values typically greater than 0 950 in a clinically stable cohort of PsA patients Between-day reliability ranged from poor to excellent for absolute CMC values Corrected CMC values were consistently higher across all variables ranging from fair to-good to excellent ICC values indicated excellent reliability for discrete spatio-temporal plantar pressure and ankle moment and power variables for both groups Reliability for ground reaction forces and kinematic discrete variables ranged from fair-to-good to excellent Standard error of measurement values ranged from 07 to 3 0 for discrete kinematic variables across both groups with greater variability in the PsA patients In conclusion intersegment kinematics and kinetics as well as spatio-temporal and plantar pressure can be reliably measured in PsA patients using a novel seven segment foot model Some discrete kinematic variables have poor reliability and should not be used in prospective cohort and intervention studies (C) 2010 Elsevier B V All rights reserve

Publisher: 'Elsevier BV'
Year: 2010
DOI identifier: 10.1016/j.gaitpost.2010.09.004
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Provided by: Enlighten
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