title: Validity and reliability of functional performance tests in meniscectomized patients with or without knee osteoarthritis.
abstract: OBJECTIVE
  Reduced functional performance and muscular dysfunction after knee injury and in knee osteoarthritis (OA) is suggested to be a factor in OA development. Validated functional performance tests applicable in the clinic and large-scale studies are lacking. The aim was to study the reliability and validity of 10 functional performance tests.
  
  
  METHODS
  Two hundred and eighty-five subjects, 15-22 years post-meniscectomy, performed 10 functional performance tests. The mean age was 54 years (SD+/-11.2) and 79% were men; 52% had radiographic OA, and 48% were categorized as symptomatic. The tests were evaluated for test-retest reliability, discriminative ability (younger vs older age, men vs women, symptom-free vs symptomatic) and floor and ceiling effects.
  
  
  RESULTS
  Two of the 10 tests, maximum number of knee bendings in 30 s and one-leg hop for distance, had good test-retest reliability (ICC 0.92, 95% CI 0.86-0.96 and 0.93, 95% CI 0.87-0.97) and were able to discriminate with regard to age, gender and symptoms, and had acceptable floor effects (9% and 3%, respectively).
  
  
  CONCLUSIONS
  This study suggests the use of two functional performance tests: knee bendings/30 s and one-leg hop for distance, easy to use for evaluation of interventions due to knee injury and knee OA and when attaining long-term data of natural disease history.
authors: Department of Orthopedics, Lund University, Lund, Sweden. ann.bremander@spenshult.se
authors: A B
authors: AB
authors: Bremander
authors: L L
authors: LL
authors: Dahl
authors: E M
authors: EM
authors: Roos
mesh_terms: D000203:Activities of Daily Living; D005260:Female; D006801:Humans; D008297:Male; D008592:Menisci, Tibial / Q000601:surgery*; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000503:physiopathology* / Q000601:surgery*; D010147:Pain Measurement; D010149:Postoperative Pain; D010809:Physical Fitness; D015203:Reproducibility of Results; D012189:Retrospective Studies; D016896:Treatment Outcome