Article

In the development of a clinical program for ambulant adults with
cerebral palsy (CP), we investigated the validity of joint angles measured from
sagittal video recordings and explored if movements in the transversal plane
identified with three-dimensional gait analysis (3DGA) affected the validity of
sagittal video joint angle measurements. METHODS: Ten observers, and 10 persons
with spastic CP (19-63 years), Gross Motor Function Classification System I-II,
participated in the study. Concurrent criterion validity between video joint
angle measurements and 3DGA was assessed by Bland-Altman plots with mean
differences and 95% limits of agreement (LoA). Pearson's correlation coefficients
(r) and scatter plots were used supplementary. Transversal kinematics >/=2 SD
from our reference band were defined as increased movement in the transversal
plane. RESULTS: The overall mean differences in degrees between joint angles
measured by 3DGA and video recordings (3 degrees , 5 degrees and -7 degrees for
the hip, knee and ankle respectively) and corresponding LoA (18 degrees , 10
degrees and 15 degrees for the hip, knee and ankle, respectively) demonstrated
substantial discrepancies between the two methods. The correlations ranged from
low (r=0.39) to moderate (r=0.68). Discrepancy between the two measurements was
seen both among persons with and without the presence of deviating transversal
kinematics. CONCLUSION: Quantifying lower limb joint angles from sagittal video
recordings in ambulant adults with spastic CP demonstrated low validity, and
should be conducted with caution. This gives implications for selecting
evaluation method of gait.
CI - Copyright (c) 2011 Elsevier B.V. All rights reserved.

Langue : ANGLAIS