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· DOS Abstracts
CAN GAIT DEVIATION INDEX BE USED EFECTIVELY
FOR THE EVALUATION OF GAIT PATHOLOGY IN
TOTAL HIP ARTHROPLASTY? AN EXPLORATIVE
RANDOMIZED TRIAL
Carsten Jensen, Signe Rosenlund, Dennis B. Nielsen, Søren Overgaard,
Anders Holsgaard-Larsen
Orthopaedic Research Unit, Department of Orthopaedic Surgery and
Traumatology, Odense University Hos, Institute of Clinical Research, University
of Southern Denmark; Departments of Orthopedic Surgery and Traumatology,
Køge and Odense Hospital; Orthopaedic Research Unit, Department of
Orthopaedic Surgery and Traumatology, Odense University Hospital
Background:
Three-dimensional gait analysis (3DGA) is widely used in the
quantitative evaluation of gait. However, 3DGA produces a large volume of
data, and simplifying such complex data into a single measure of patients overall
gait ‘quality’ would be valuable in clinical practice. The experience with GDI in
osteoarthritis (OA) patients following total hip arthroplasty (THA) is novel.
Purpose / Aim of Study:
The aim of our study was to use the GDI to evaluate
post-operative gait quality changes in patients with hip OA following two types
of THA.
Materials and Methods:
A total of 38 patients (11F:27M, age 56 ± 5.6, BMI
27.8 ± 3.6) with unilateral end-stage primary hip OA were evaluated pre-oper-
atively, two- and six- months after THA, while walking at self- selected speed.
From the entire gait cycle, rather than a small number of discrete parameters,
the GDI was calculated for each limb (n=76 limbs). The normative mean and
standard deviation from age-matched controls (n=20) were used as refer-
ence. A fixed-effects multilevel regression model was employed to evaluate the
treatment effects.
Findings / Results:
Patients had a moderate deviation from normative gait
(score = 100) before surgical treatment (83.4 ± 10.9). After surgery, the score
improved significantly by 4.9 [95CI: 2.1 to 7.9]. There was no difference in GDI
scores between the two treatments; 1.8 [95CI: -2.8 to 6.4]. However, the GDI
score for the non-operated limb was higher than the GDI score for the operated
limb; 2.5 [95CI: 0.1 to 4.8].
Conclusions:
GDI increased after THA, which indicates an overall improvement
in gait quality. No difference between treatments was observed. Asymmetrical
gait pattern do not disappear following THA. Further research is required to es-
tablish the clinical relevant difference for the GDI score for THA patients.
163.
