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Published in: International Orthopaedics 11/2019

01-11-2019 | Osteoarthrosis | Original Paper

Influence of body mass index on sagittal hip range of motion and gait speed recovery six months after total hip arthroplasty

Authors: Pierre Martz, Abderrahmane Bourredjem, Jean Francis Maillefert, Christine Binquet, Emmanuel Baulot, Paul Ornetti, Davy Laroche

Published in: International Orthopaedics | Issue 11/2019

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Abstract

Purpose

In practice, obesity leads to poor functional outcomes after total hip arthroplasty (THA). However, in clinical research, the influence of body mass index (BMI) on the gait recovery and kinematics for THA is not well documented. The purpose of this study was to assess the influence of BMI on gait parameters pre-operatively and six months after THA for hip osteoarthritis (OA) patients.

Methods

We included 76 THA for hip OA: non-obese group (G1): 49 (BMI < 30 kg/2) and obese group (G2): 37 (BMI ≥ 30 kg/m2) with a control group of 61 healthy people. Clinical evaluation (HOOS) and a 3D gait analysis (gait speed and flexion range of the hip (ROM)) were performed before and six months after THA: The gains between the two visits were calculated and we looked for correlations between outcomes and BMI.

Results

Preoperative gait speed and hip ROM were significantly lower in obese patients (speed G1: 0.81 ± 0.22 m/s vs. G2: 0.64 ± 0.23 m/s, p = 0.004 and hip ROM G1: 26.1° ± 7.3 vs. G2: 21.4° ± 6.6, p = 0.005), and obese patients were more symptomatic. At six months, gait speed and hip ROM were significantly lower for all patients compared with the control group. No correlation between gait velocity, hip ROM, and BMI was found. Biomechanical and clinical gains were comparable in the two groups.

Conclusions

All patients, including obese patients, have significant functional improvement after THA, objectively assessed by gait speed. Even if patients did not fully recover to the level of a healthy control person after THA, functional gain is comparable irrespective of BMI.
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Metadata
Title
Influence of body mass index on sagittal hip range of motion and gait speed recovery six months after total hip arthroplasty
Authors
Pierre Martz
Abderrahmane Bourredjem
Jean Francis Maillefert
Christine Binquet
Emmanuel Baulot
Paul Ornetti
Davy Laroche
Publication date
01-11-2019
Publisher
Springer Berlin Heidelberg
Published in
International Orthopaedics / Issue 11/2019
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-018-4250-y

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