Skip to main content

Association between body mass index change and outcome in the first year after total knee Arthroplasty

Mackie, Alasdair, Muthumayandi, Karthikeyan, Shirley, Mark, Deehan, David, Gerrand, Craig (2014) Association between body mass index change and outcome in the first year after total knee Arthroplasty. The Journal of Arthroplasty, 30 (2). ISSN 0883-5403. E-ISSN 1532-8406. (doi:10.1016/j.arth.2014.09.003) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided)

PDF - Publisher pdf
Restricted to Repository staff only
Contact us about this Publication Download (297kB)
Official URL


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.

Item Type: Article
DOI/Identification number: 10.1016/j.arth.2014.09.003
Uncontrolled keywords: weight change; BMI; TKA; impact; knee; outcome
Subjects: R Medicine
Divisions: Faculties > Sciences > School of Sport and Exercise Sciences
Depositing User: Karthikeyan Muthumayandi
Date Deposited: 03 Oct 2016 08:09 UTC
Last Modified: 29 May 2019 13:17 UTC
Resource URI: (The current URI for this page, for reference purposes)
Muthumayandi, Karthikeyan:
  • Depositors only (login required):


Downloads per month over past year