title: Impact of body mass index on functional performance after total knee arthroplasty.
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.
authors.affiliation: Physical Therapy Program, Department of Physical Medicine and Rehabilitation, University of Colorado Denver, Aurora, Colorado 80045, USA.
authors.forename: Jennifer E
authors.initials: JE
authors.lastname: Stevens-Lapsley
authors.forename: Stephanie C
authors.initials: SC
authors.lastname: Petterson
authors.forename: Ryan L
authors.initials: RL
authors.lastname: Mizner
authors.forename: Lynn
authors.initials: L
authors.lastname: Snyder-Mackler
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee; D015992:Body Mass Index; D004185:Disability Evaluation; D005260:Female; D005500:Follow-Up Studies; D006306:Health Surveys; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000150:complications / Q000503:physiopathology; D020370:Osteoarthritis, Knee / Q000601:surgery; D020127:Recovery of Function / Q000502:physiology; D016896:Treatment Outcome