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Association Between Body Mass Index Change and Outcome in the First Year After Total Knee Arthroplasty

Lookup NU author(s): Karthikeyan Muthumayandi, Dr Mark ShirleyORCiD, Professor David Deehan, Craig Gerrand

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Abstract

There is an association between obesity, osteoarthritis and total knee arthroplasty (TKA), but little is known about how postoperative weight change influences outcomes. Primary TKA patients were identified from an institutional arthroplasty registry. BMI and patient reported outcome measures (PROMs, specifically WOMAC and SF36) were recorded for 1545 patients preoperatively and up to 3 years postoperatively. Mixed effects modelling showed postoperative BMI change had no impact on postoperative WOMAC scores. However, weight gain over 10% had a negative impact on SF36 pain and functional scores although postoperative weight loss was not associated with improved PROMs. Men showed greater improvement in postoperative SF36 function and pain scores, whilst older patients were slower to improve. Postoperative weight gain has a negative association with SF36 pain and function. (C) 2014 Elsevier Inc. All rights reserved.

Publication metadata

Author(s): Mackie A, Muthumayandi K, Shirley M, Deehan D, Gerrand C

Publication type: Article

Publication status: Published

Journal: Journal of Arthroplasty

Year: 2015

Volume: 30

Issue: 2

Pages: 206-209

Print publication date: 01/02/2015

Online publication date: 16/09/2014

Acceptance date: 02/09/2014

ISSN (print): 0883-5403

ISSN (electronic): 1532-8406

Publisher: Churchill Livingstone

URL: http://dx.doi.org/10.1016/j.arth.2014.09.003

DOI: 10.1016/j.arth.2014.09.003

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