title: Patient-reported outcome measures after total knee arthroplasty: a systematic review.
abstract: OBJECTIVE
  A lack of connection between surgeons and patients in evaluating the outcome of total knee arthroplasty (TKA) has led to the search for the ideal patient-reported outcome measure (PROM) to evaluate these procedures. We hypothesised that the desired psychometric properties of the ideal outcome tool have not been uniformly addressed in studies describing TKA PROMS.
  
  
  METHODS
  A systematic review was conducted investigating one or more facets of patient-reported scores for measuring primary TKA outcome. Studies were analysed by study design, subject demographics, surgical technique, and follow-up adequacy, with the 'gold standard' of psychometric properties being systematic development, validity, reliability, and responsiveness.
  
  
  RESULTS
  A total of 38 articles reported outcomes from 47 different PROMS to 85 541 subjects at 26.3 months (standard deviation 30.8) post-operatively. Of the 38, eight developed new scores, 20 evaluated existing scores, and ten were cross-cultural adaptation of existing scores. Only six of 38 surveyed studies acknowledged all 'gold standard' psychometric properties. The most commonly studied PROMS were the Oxford Knee Score, New Knee Society Score, Osteoarthritis Outcome Score, and Western Ontario and McMaster Universities Osteoarthritis Index.
  
  
  CONCLUSIONS
  A single, validated, reliable, and responsive PROM addressing TKA patients' priorities has not yet been identified. Moreover, a clear definition of a successful procedure remains elusive. Cite this article: Bone Joint Res 2015;4:120-127.
authors.affiliation: Hospital for Special Surgery, 535 E 70th St, Bellaire Building, Suite 9-11, New York 10021, USA.
authors.forename: P N
authors.initials: PN
authors.lastname: Ramkumar
authors.affiliation: Houston Methodist Orthopedics and Sports Medicine, 6550 Fannin Street, Smith Tower, Suite 2511 Houston, Texas 77030, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Harris
authors.affiliation: Houston Methodist Orthopedics and Sports Medicine, 6550 Fannin Street, Smith Tower, Suite 2511 Houston, Texas 77030, USA.
authors.forename: P C
authors.initials: PC
authors.lastname: Noble
keywords: Measure; Outcomes; TKA