Impact of body mass index on functional performance after total knee arthroplasty

  • Jennifer E. Stevens-Lapsley
  • , Stephanie C. Petterson
  • , Ryan L. Mizner
  • , Lynn Snyder-Mackler

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

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/m2 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.

Original languageEnglish
Pages (from-to)1104-1109
Number of pages6
JournalJournal of Arthroplasty
Volume25
Issue number7
DOIs
StatePublished - Oct 2010

Funding

This study was funded by a National Institutes of Health (NIH) grant ( R01-HD041055 ). Support for investigators was also provided by an NIH training grant ( T32HD007490 ) and the American Physical Therapy Association Foundation (PODS I, II, Mary McMillan scholarships). We wish to acknowledge the expertise of the physical therapists at the University of Delaware Physical Therapy Clinic (Newark, Del) as well as Michael Axe, MD, Alex Bodenstab, MD, William Newcomb, MD, and Leo Rasis, MD at First State Orthopaedics (Newark, Del).

FundersFunder number
T32HD007490
American Physical Therapy Association
R01HD041055

    Keywords

    • Body mass index
    • Functional performance
    • Obesity
    • Total knee arthroplasty

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