Article

The Gait Deviation Index (GDI) and Gait Profile Score (GPS) are the most used
summary measures of gait in children with cerebral palsy (CP). However, the
reliability and agreement of these indices have not been investigated, limiting
their clinimetric quality for research and clinical practice. The aim of this
study was to investigate the intra-rater reliability and agreement of summary
measures of gait (GDI ; GPS ;
and the Gait Variable Score (GVS) derived from the
GPS). The intra-rater reliability and agreement were investigated across two
repeated sessions in 18 children aged 5-12 years diagnosed with spastic CP. No
systematic bias was observed between the sessions and no heteroscedasticity was
observed in Bland-Altman plots. For the GDI and GPS, excellent reliability with
intraclass correlation coefficient (ICC) values of 0.8-0.9 was found, while the
GVS was found to have fair to good reliability with ICCs
of 0.4-0.7. The
agreement for the GDI and the logarithmically transformed GPS, in terms of the
standard error of measurement as a percentage of the grand mean (SEM%) varied
from 4.1 to 6.7%, whilst the smallest detectable change in percent (SDC%) ranged
from 11.3 to 18.5%. For the logarithmically transformed GVS, we found a fair to
large variation in SEM% from 7 to 29% and in SDC% from 18 to 81%. The GDI and GPS
demonstrated excellent reliability and acceptable agreement proving that they can
both be used in research and clinical practice. However, the observed large
variability for some of the GVS requires cautious consideration when selecting
outcome measures.
CI - Copyright (c) 2015 Elsevier B.V. All rights reserved.

Langue : ANGLAIS