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Outcome Measures in Total Knee Arthroplasty

  • Ayman Gabr
  • Rosamond Tansey
  • Fares S. Haddad

Abstract

The accurate measurement of outcome after total knee arthroplasty (TKA) is essential for both clinicians and researchers. However, there appears to be no consensus regarding which outcome measure or combination of measures is most appropriate for evaluating recovery after TKA. The World Health Organization (WHO) has introduced the International Classification of Functioning, Disability and Health (ICF) in an attempt to establish a common language for describing health and health-related states. Outcome measures are broadly classified into subjective (patient-reported outcome measures, PROMs) and objective measures. Over the last decade, there has been a shift from objective outcome tools to the development and validation of PROMS. However, most PROMs have ‘floor’ and ‘ceiling’ effects. Performance-based outcome measures assess the ability of a patient to complete directly observed tasks. They assess the patient’s true performance rather than their perception of their performance. This can eliminate the difficulty of differentiating outcomes in patients at the lower and higher ends of a scale. Utilising the ICF framework, a combination of PROMs and performance-based outcomes can be used for both short- and long-term follow-up after TKA to assess patient outcome and evaluate implants, surgical approaches and rehabilitation regimes.

Keywords

Outcome Measures PROM Knee Arthroplasty Replacement 

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.Department of Orthopaedic SurgeryUniversity College London HospitalsLondonUK

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