Influence of patient factors on TKA outcomes at 5 to 11 years followup.
Many studies suggest patient factors influence TKA outcomes, but the reported data are controversial, due perhaps in part to using only postoperative scores rather than change in scores from pre- to postoperatively. We examined the effect of gender, age, diagnosis, and obesity on changes in pre- to postoperative outcome measures (Knee Society clinical rating, WOMAC, and SF-12) in a cohort of 843 consecutive knee arthroplasties in 728 patients who received the same implant (Genesis II, Smith & Nephew, Memphis, TN). Minimum followup was 5 years (mean, 9.5 years; range, 5-11 years). Kaplan Meier survivorship was 98% +/- 0.007 with any reoperation as an end point. Male and female patients had similar increases in postoperative scores. Diagnosis and obesity made no difference in postoperative increases. However, less improvement occurred in health-related quality-of-life outcomes scores with advancing age.
Bourne
Robert B
RB
London Health Sciences Centre, University of Western Ontario, London, Ontario, Canada. robert.bourne@lhsc.on.ca
McCalden
Richard W
RW
MacDonald
Steven J
SJ
Mokete
Lipalo
L
Guerin
Jeff
J
D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000401:mortality* / Q000706:statistics & numerical data*; D015992:Body Mass Index; D016208:Databases, Factual; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000401:mortality*; D011446:Prospective Studies; D011788:Quality of Life; D012086:Reoperation / Q000706:statistics & numerical data; D012307:Risk Factors; D017678:Sex Distribution