The impact of morbid obesity on patient outcomes after total knee arthroplasty.
Five hundred fifty patients who underwent primary total knee arthroplasty between 1987 and 2004 with a primary diagnosis of osteoarthritis and 1-year outcome data (Western Ontario and McMaster Osteoarthritis Index [WOMAC]) were evaluated. Patients were stratified into body mass index categories based on the World Health Organization classification of obesity. Patients were dichotomized into a class III morbidly obese group and a non-morbidly obese group. Independent t test and multivariable linear regression were used to determine if a difference existed in the 1-year WOMAC outcome between morbidly obese patients and all other patients. Although 1-year outcomes were worse for morbidly obese patients (P < .05), they showed greater improvement in function compared with non-morbidly obese patients. Morbid obesity does not affect 1-year outcomes in patients who have had a total knee arthroplasty.
Faculty of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada.
Vaishnav
V
Rajgopal
Robert B
RB
Bourne
Bert M
BM
Chesworth
Steven J
SJ
MacDonald
Richard W
RW
McCalden
Cecil H
CH
Rorabeck
D000368:Aged; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000503:physiopathology* / Q000523:psychology*; D020370:Osteoarthritis, Knee / Q000503:physiopathology / Q000523:psychology / Q000601:surgery*; D017063:Outcome Assessment, Health Care; D011446:Prospective Studies; D012189:Retrospective Studies; D016896:Treatment Outcome