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Impact of Body Mass Index on Functional Performance After Total Knee Arthroplasty

Authors
Journal
The Journal of Arthroplasty
0883-5403
Publisher
Elsevier
Publication Date
Volume
25
Issue
7
Identifiers
DOI: 10.1016/j.arth.2009.08.009
Keywords
  • Total Knee Arthroplasty
  • Body Mass Index
  • Obesity
  • Functional Performance

Abstract

Abstract The purpose of this investigation was to determine whether functional performance and self-report outcomes are related to body mass index (BMI) after total knee arthroplasty (TKA). We hypothesized that higher BMIs would negatively affect functional performance as assessed by the timed up-and-go test, stair climbing test, 6-minute walk test, and self-report questionnaires. A total of 140 patients with BMIs ranging from 21.2 to 40.0 kg/m 2 were followed over the first 6 months after unilateral TKA. Hierarchical linear regression was used to evaluate the impact of BMI on functional performance at 1, 3, and 6 months after TKA, while taking into account preoperative functional performance. There were no meaningful relationships between BMI and functional performance in the subacute (1 and 3 months) and intermediate (6-month) stages of recovery.

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