TY - JOUR
T1 - The outcome of total knee arthroplasty in obese patients
AU - Foran, Jared R.H.
AU - Mont, Michael A.
AU - Etienne, Gracia
AU - Jones, Lynne C.
AU - Hungerford, David S.
PY - 2004/8
Y1 - 2004/8
N2 - Background: Evidence linking increased body weight to osteoarthritis of the knee and the high prevalence of obesity underscore the importance of defining the outcome of total knee arthroplasty in obese patients. The purpose of this study was to compare the clinical and radiographic results of total knee arthroplasties performed in obese patients with those of total knee arthroplasties performed in nonobese patients. Methods: Clinical and radiographic data on seventy-eight total knee arthroplasties in sixty-eight obese patients were compared with data on a matched group of nonobese patients. The analysis was also performed after stratification of the obese group for the degree of obesity. All patients had the same prosthesis. The clinical data that were analyzed included the Knee Society objective and functional scores, patellofemoral symptoms, activity level, and complications. Results: The percentage of knees with a Knee Society score of ≥80 points at an average of eighty months was 88% in the obese group, which was significantly lower than the 99% rate in the nonobese group at the same time. The morbidly obese subgroup had a significantly higher revision rate than did the nonobese group (p = 0.02). Conclusions: The results of the present study suggest that any degree of obesity, defined as a body mass index of ≥30, has a negative effect on the outcome of total knee replacement. Level of Evidence: Prognostic study, Level II-1 (retrospective study).
AB - Background: Evidence linking increased body weight to osteoarthritis of the knee and the high prevalence of obesity underscore the importance of defining the outcome of total knee arthroplasty in obese patients. The purpose of this study was to compare the clinical and radiographic results of total knee arthroplasties performed in obese patients with those of total knee arthroplasties performed in nonobese patients. Methods: Clinical and radiographic data on seventy-eight total knee arthroplasties in sixty-eight obese patients were compared with data on a matched group of nonobese patients. The analysis was also performed after stratification of the obese group for the degree of obesity. All patients had the same prosthesis. The clinical data that were analyzed included the Knee Society objective and functional scores, patellofemoral symptoms, activity level, and complications. Results: The percentage of knees with a Knee Society score of ≥80 points at an average of eighty months was 88% in the obese group, which was significantly lower than the 99% rate in the nonobese group at the same time. The morbidly obese subgroup had a significantly higher revision rate than did the nonobese group (p = 0.02). Conclusions: The results of the present study suggest that any degree of obesity, defined as a body mass index of ≥30, has a negative effect on the outcome of total knee replacement. Level of Evidence: Prognostic study, Level II-1 (retrospective study).
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U2 - 10.2106/00004623-200408000-00002
DO - 10.2106/00004623-200408000-00002
M3 - Article
C2 - 15292406
AN - SCOPUS:3542998083
SN - 0021-9355
VL - 86
SP - 1609
EP - 1615
JO - Journal of Bone and Joint Surgery - Series A
JF - Journal of Bone and Joint Surgery - Series A
IS - 8
ER -