The Effects of Bariatric Surgery Weight Loss on Knee Pain in Patients with Osteoarthritis of the Knee

Author:

Edwards Christopher1,Rogers Ann2,Lynch Scott3,Pylawka Tamara3,Silvis Matthew4,Chinchilli Vernon5,Mosher Timothy6,Black Kevin3

Affiliation:

1. Penn State College of Medicine, Penn State Hershey Medical Center, Penn State University, 500 University Drive, Hershey, PA 17033, USA

2. Department of Surgery, Penn State Hershey Medical Center, 500 University Drive, MC H149, Hershey, PA 17033, USA

3. Department of Orthopaedics and Rehabilitation, Penn State Hershey Medical Center, 30 Hope Drive, P.O. Box 859, Hershey, PA 17033, USA

4. Department of Family and Community Medicine, Penn State Hershey Medical Center, 500 University Drive, H154, Hershey, PA 17033, USA

5. Department of Health Evaluation Sciences, Penn State College of Medicine, Penn State Hershey Medical Center, 600 Centerview Drive, Suite 2200, P.O. Box 855, Hershey, PA 17033, USA

6. Department of Radiology, Penn State Hershey Medical Center, 500 University Drive, H066, Hershey, PA 17033, USA

Abstract

Studies have shown that osteoarthritis (OA) is highly associated with obesity, and individuals clinically defined as obese (BMI > 30.0 kg/m2) are four times more likely to have knee OA over the general population. The purpose of this research was to examine if isolated weight loss improved knee symptoms in patients with osteoarthritis. Adult patients (n=24; age 18–70; BMI > 35 kg/m2) with clinical and radiographic evidence of knee OA participated in a one-year trial in which WOMAC and KOOS surveys were administered at a presurgery baseline and six and twelve months postsurgery. Statistical analysis was performed using Student's t and Wilcoxon Signed Rank tests. Weight loss six and twelve months following bariatric surgery was statistically significant (P<0.05) compared to presurgery measurements. All variables from both KOOS and WOMAC assessments were significantly improved (P<0.05) when compared to baseline. Isolated weight loss occurring via bariatric surgery resulted in statistically significant improvement in patient’s knee arthritis symptoms at both six and twelve months. Further research will need to be done to determine if symptom relief continues over time, and if the benefits are also applicable to individuals with symptomatic knee arthritis that are overweight but not obese.

Publisher

Hindawi Limited

Subject

Orthopedics and Sports Medicine,Rheumatology

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