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Open Access 01-12-2015 | Original Research Article

Image-Guided Hyaluronic Acid Injection and Knee Bracing Significantly Improve Clinical Outcomes for High-Grade Osteoarthritis

Authors: Terry K. Morgan, Emilie Jensen, Jeong Lim, Russell Riggs

Published in: Sports Medicine - Open | Issue 1/2015

Abstract

Background

Intra-articular hyaluronic acid (HA) injection is an intermediate option between analgesics and knee joint replacement in patients with osteoarthritis (OA). Our objective was to test whether image-guided HA injections may improve knee OA outcomes after 6 months of treatment independent of potential covariates.

Methods

This is a retrospective case series with multivariate outcome-based analysis of 207 consecutive adult patients with mild to severe knee OA treated at a single out-patient clinic employing fluoroscopy-guided HA injections. We employed a customized pain (scored 0–10) and function (scored 0–120) questionnaire based on the Likert scale to compare baseline scores with 6-month outcomes. Linear and logistic (based on >9-point score improvement) regression analysis was used to adjust for potential covariates, including grade of disease, patient age, gender, body mass index, smoking history, medical history (e.g., diabetes or heart disease), use of daily pain medications, fish oil supplementation, knee bracing, and physical therapy.

Results

Significant covariates included OA grade, knee bracing, and analgesic use. Most of the study subjects were women (124/207, 60 %) and obese (113/207, 55 %). Clinically significant improvements in index scores (>9 points) at 6 months were observed in more than 50 % of cases post-image-guided HA injection. Regression analysis revealed a complimentary affect with knee bracing, especially in severe grade 4 disease (odds ratio 5.5 [1.14–27.0], P < 0.05). Daily analgesic use reflected a poor clinical response to treatment.

Conclusions

Our data suggest image-guided HA injections coupled with knee bracing may benefit patients with moderate to severe knee osteoarthritis.

Key Points

Image-guided hyaluronic acid injections significantly improve clinical outcomes at 6 months for mild, moderate, and severe knee osteoarthritis.
Knee bracing is a significant covariate for clinical improvement in severe grade 4 disease.
Daily analgesic use is associated with high-grade disease and less clinical improvement.

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Title: Image-Guided Hyaluronic Acid Injection and Knee Bracing Significantly Improve Clinical Outcomes for High-Grade Osteoarthritis
Authors: Terry K. Morgan
Emilie Jensen
Jeong Lim
Russell Riggs
Publication date: 01-12-2015
Publisher: Springer International Publishing
Published in: Sports Medicine - Open / Issue 1/2015
Print ISSN: 2199-1170
Electronic ISSN: 2198-9761
DOI: https://doi.org/10.1186/s40798-015-0029-5

At a glance: The STEP trials

Springer Medicine

Image-Guided Hyaluronic Acid Injection and Knee Bracing Significantly Improve Clinical Outcomes for High-Grade Osteoarthritis

Abstract

Background

Methods

Results

Conclusions

Key Points

At a glance: The STEP trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

Key Points

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