title: [Prognostic factors to assess the value of arthroscopy in gonarthrosis].
abstract: OBJECTIVE
  The value of athroscopy in osteoarthritis(oa) of the knee remains uncertain. Many studies claim to prove efficacy of arthroscopy in oa of the knee, while other authors report that there is no such effect. The purpose of this study was to identify factors to predict the outcome of arthroscopy in oa of the knee.
  
  
  METHODS
  The modified Lysholm score was used to assess the outcome of arthroscopy in 49 patients after a follow up of 2.5 yrs. This was a retrospective outcome study.
  
  
  RESULTS
  No correlation between modified Lysholm score and patient age and gender could be detected. There were significantly better outcomes in the group of patient with no deviation of axis and in the group of patients which did not show a progression of oa of the knee in the radiographs during follow-up. Even if the patients had more severe osteoarthritis.
  
  
  CONCLUSIONS
  Patient selection is an important factor for a good outcome after arthroscopy in older patients with oa of the knee. Deviation of the axis and the "activity" of the osteoarthritis at the time of surgery are predictors for outcome. There is the need to establish diagnostic tools to measure the "activity" of oa of the knee before surgery.
authors.affiliation: Orthopädische Klinik und Poliklinik, LMU München, Grosshadern, München, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Mazoochian
authors.forename: M F
authors.initials: MF
authors.lastname: Pietschmann
authors.forename: M
authors.initials: M
authors.lastname: Krüger-Franke
authors.forename: V
authors.initials: V
authors.lastname: Jansson
authors.forename: P E
authors.initials: PE
authors.lastname: Müller
mesh_terms: D001182:Arthroscopy / Q000706:statistics & numerical data*; D005260:Female; D005858:Germany / Q000453:epidemiology; D006801:Humans; D008297:Male; D020370:Osteoarthritis, Knee / Q000175:diagnosis / Q000453:epidemiology* / Q000601:surgery*; D017063:Outcome Assessment, Health Care / Q000379:methods*; D011379:Prognosis; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D016896:Treatment Outcome