Article

Multiple marker sets and models are currently available for assessing pelvic
kinematics in gait. Despite the presence of a variety models, there are still
debates on their reliability and consistency, and consequently there is no
clearly defined standard. Two marker sets were evaluated in this study: the
'Traditional' where markers are placed at the anterior and posterior superior
iliac spines (ASISs, PSISs); and the 'Cluster', where a cluster of three
orthogonal markers fixed on a rigid based is attached to the sacrum. The two sets
were compared with respect to intra and inter session standard deviations of
maximum pelvic tilt, obliquity and rotation angles. The repeatability between and
within sessions was measured using coefficient of multiple correlation (CMC).
Also the similarity between the two sets was assessed using inter-protocol CMC
(ipCMC). Both data sets generated showed high within and between session
repeatability in the sagittal plane (CMC>0.80), although the Cluster method
showed higher repeatability than that of the Traditional method in non-sagittal
plane motion for both within and between sessions. The authors are not aware of
other studies reporting the differences in intra and inter session variability
and repeatability values for different body mass index categories such as
overweight and obese subjects with relatively large sample size. Hence the
Cluster method overcomes a number of theoretical and experimental limitations
such as minimising the marker occlusion and is a reliable alternative to the
Traditional (the standard) marker set.
CI - Copyright (c) 2013 Elsevier B.V. All rights reserved.

Langue : ANGLAIS