Article

Regression equations based on pelvic anatomy are routinely used to estimate the
hip joint centre during gait analysis. While the associated errors have been well
documented, the clinical significance of these errors has not been reported. This
study investigated the clinical agreement of three commonly used regression
equation sets (Bell et al., Davis et al. and Orthotrak software) against the
equations of Harrington et al. Full 3-dimensional gait analysis was performed on
18 healthy paediatric subjects. Kinematic and kinetic data were calculated using
each set of regression equations and compared to Harrington et al. In addition,
the Gait Profile Score and GDI-Kinetic were used to assess clinical significance.
Bell et al. was the best performing set with differences in Gait Profile Score
(0.13 degrees ) and GDI-Kinetic (0.84 points) falling below the clinical
significance threshold. Small deviations were present for the Orthotrak set for
hip abduction moment (0.1 Nm/kg), however differences in Gait Profile Score (0.27
degrees ) and GDI-Kinetic (2.26 points) remained below the clinical threshold.
Davis et al. showed least agreement with a clinically significant difference in
GDI-Kinetic score (4.36 points). It is proposed that Harrington et al. or Bell et
al. regression equation sets are used during gait analysis especially where
inverse dynamic data are calculated. Orthotrak is a clinically acceptable
alternative however clinicians must be aware of the effects of error on hip
abduction moment. The Davis et al. set should be used with caution for inverse
dynamic analysis as error could be considered clinically meaningful.
CI - Copyright (c) 2014 Elsevier B.V. All rights reserved.

Langue : ANGLAIS