title: Cross-sectional study of pain and disability at knee replacement surgery for osteoarthritis in 299 patients.
abstract: OBJECTIVE
  To evaluate pain and disability at the time of knee replacement surgery for osteoarthritis.
  
  
  METHODS
  In this multicenter cross-sectional study, 299 patients at 12 orthopedic surgery centers in Lyon, France were evaluated on the day before knee replacement surgery. Pain severity was assessed on a visual analog scale (VAS) and function using the Lequesne index and the Western Ontario McMaster Universities Osteoarthritis Index (WOMAC).
  
  
  RESULTS
  There were 207 women and 92 men with a mean age of 73 years. Mean (+/-SD) VAS pain score upon walking was 55.8+/-24mm. Compared to patients with very severe disability (Lequesne index>12), those with mild-to-severe disability (Lequesne index<or=12) were more likely to be older than 70 years (odds ratio [OR], 2.85; 95% confidence interval [95%CI], 1.25-5) and male (OR, 2.5; 95%CI, 1.3-5); they were less likely to have a body mass index>27kg/m(2) (OR, 2.2; 95%CI, 1.3-3.3) and to engage in sporting activities (OR, 3.3; 95%CI, 1.4-10).
  
  
  CONCLUSIONS
  Patients about to undergo knee replacement surgery had high levels of pain and disability, with little variation across centers. Nevertheless, the severity of pain and disability may depend in part on age, gender, body mass index, and sporting activities, which probably influence the decision to perform knee replacement surgery.
authors: Rheumatology Department, Pavilion 2B, Lyon-South Hospital Center, 69495 Pierre Bénite, France. florence.merle-vincent@chu-lyon.fr
authors: Florence
authors: F
authors: Merle-Vincent
authors: Chantal M
authors: CM
authors: Couris
authors: Anne-Marie
authors: AM
authors: Schott
authors: Marie
authors: M
authors: Perier
authors: Sylvie
authors: S
authors: Conrozier
authors: Thierry
authors: T
authors: Conrozier
authors: Muriel
authors: M
authors: Piperno
authors: Pierre
authors: P
authors: Mathieu
authors: Eric
authors: E
authors: Vignon
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee; D003430:Cross-Sectional Studies; D004185:Disability Evaluation; D005260:Female; D005602:France / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D020370:Osteoarthritis, Knee / Q000150:complications* / Q000453:epidemiology / Q000503:physiopathology; D010146:Pain / Q000453:epidemiology / Q000209:etiology* / Q000503:physiopathology; D010147:Pain Measurement; D011446:Prospective Studies; D020127:Recovery of Function; D012720:Severity of Illness Index