The Center for Outcomes Research (COR) at the University of Massachusetts Medical School (UMMS) managed the Hip & Knee Registry. This collection showcases publications about the project and project research.


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Recently Published

  • Prolonged prophylaxis in orthopedic surgery: insights from the United States

    Anderson, Frederick A. Jr.; White, Kami (2002-08-17)
    The U.S. Hip and Knee Registry is a voluntary national registry of outcome data for hip and knee surgery. In total, 469 orthopedic surgeons from 325 hospitals reported data on 7677 patients who underwent total hip arthroplasty (THA) and 11,461 patients who underwent total knee arthroplasty (TKA). Data on patients enrolled between 1996 and 2000 indicate that 40% of THA patients and 42% of TKA patients received prophylaxis for a period of 8 to 21 days, including the in-hospital period. Prolonged prophylaxis for more than 21 days was used in 49% of THA patients and 44% of TKA patients. Moreover, year on year, data indicate that the percentage of patients who receive prophylaxis for longer than 21 days is gradually increasing. In 2000, 53% of THA patients and 47% of TKA patients received prophylaxis for longer than 21 days.
  • Defining the relationship between obesity and total joint arthroplasty

    Stickles, Beverly; Phillips, Leslie; Brox, Williams Timothy; Owens, Brett D.; Lanzer, William L. (2001-04-27)
    OBJECTIVE: The purpose of this study was to examine the relationship between obesity and patient-administered outcome measures after total joint arthroplasty. RESEARCH METHODS AND PROCEDURES: A voluntary questionnaire-based registry contained 592 primary total hip arthroplasty patients and 1011 primary total knee arthroplasty patients with preoperative and 1-year data. Using logistic regression, the relationships between body mass index and the several outcome measures, including Short Form-36 and Western Ontario and McMaster Universities Osteoarthritis Index, were examined. RESULTS: There was no difference between obese and non-obese patients regarding satisfaction, decision to repeat surgery, and Delta physical component summary, Delta mental component summary, and Delta Western Ontario and McMaster Universities Osteoarthritis Index scores (p > 0.05 for all). Body mass index was associated with an increased risk of having difficulty descending or ascending stairs at 1 year (odds ratio, 1.2 to 1.3). DISCUSSION: Obese patients enjoy as much improvement and satisfaction as other patients from total joint arthroplasty.