Is patient reporting of physical function accurate following total knee replacement?

D.F. Hamilton*, P. Gaston, A.H.R.W. Simpson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


The aim of this study was to determine the association between the Oxford knee score (OKS) and direct assessment of outcome, and to examine how this relationship varied at different time-points following total knee replacement (TKR). Prospective data consisting of the OKS, numerical rating scales for ‘worst pain’ and ‘perceived mean daily pain’, timed functional assessments (chair rising, stairs and walking ability), goniometry and lower limb power were recorded for 183 patients pre-operatively and at six,26 and 52 weeks post-operatively. The OKS was influenced primarily by the patient’s level of pain rather than objective functional assessments. The relationship between report of outcome and direct assessment changed over time:R2 = 35% pre-operatively, 44% at six weeks, 57% at 26 weeks and 62% at 52 weeks. The relationship between assessment of performance and report of performance improved as the patient’s report of pain diminished, suggesting that patients’ reporting of functional outcome after TKR is influenced more by their pain level than their ability to accomplish tasks.

Original languageEnglish
Pages (from-to)1506-1510
Number of pages5
JournalBone and Joint Journal
Issue number11
Early online date1 Nov 2012
Publication statusPublished - 1 Nov 2012


  • arthroplasty
  • outcome
  • function
  • TKR
  • patient-reported

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine


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