DOS Kongressen 2014 ·
193
Is gait velocity and gait quality associated with
hip muscle strength in hip osteoarthritis patients
scheduled for total hip arthroplasty?
Signe Rosenlund, Dennis Brandborg Nielsen, Søren Overgaard, Carsten Jensen,
Anders Holsgaard-Larsen
Department of Orthopedic Surgery and Traumatology and Orthopaedic
Research Unit, Department of Ortho, Køge Hospital and Odense University
Hospital; Orthopaedic Research Unit, Department of Orthopaedic Surgery
and Traumatology, Odense University Hospital; Orthopaedic Research Unit,
Department of Orthopaedic Surgery and Traumatology and Institute of Clini,
Odense University Hospital and University of Southern Denmark
Background:
Association between lower extremity muscle strength and gait
velocity has been documented in healthy elderly individuals but not in patients
with end- stage hip osteoarthritis (OA). Three- dimensional (3D) gait analysis
help identify gait pathology. But the complexity and amount of data collected
during gait analysis lead to challenges when interpreting these. Gait Deviation
Index (GDI) summarizes the lower limb kinematic data and describes 98% of
the variation in gait.
Purpose / Aim of Study:
The aim of this study was to investigate associations
between hip muscle strength, gait velocity, and GDI in patients with end- stage
hip OA.
Materials and Methods:
A cohort of 20 consecutive patients all with unilateral
end-stage hip OA scheduled for THA (5 women and 15 men; age 61± 5.8 years;
BMI 28.1 ± 3.4 (mean ± SD)). All completed 3D gait analysis and performed
isometric maximal voluntary hip muscle strength (MVC) tests (hip-flexion,
-abduction and - extension). A GDI of 100 indicates no gait pathology and a
10 point change represents 1 SD from the reference group. Linear regression
analysis were used to determine coefficient of determination using GDI or gait
velocity as dependent variables and hip MVC as the independent variables.
Findings / Results:
A significant association (R2 = 0.43; p=0.03) between gait
velocity and hipMVCwas observed usingmultiple linear regression. Furthermore,
simple regression analysis revealed a moderate association (R2 = 0.23; p=0.03)
between hip abduction and gait velocity. However, no association between GDI
and hip MVC was found.
Conclusions:
The present study confirms an association between hip MVC and
gait velocity for OA patients scheduled for THA. However, no association be-
tween hip MVC and gait quality was shown. The present data indicate that reha-
bilitation aimed at improving hip muscle strength would be effective.
140.
