title: A novel methodological approach for measuring symptomatic change following total joint arthroplasty.
abstract: The OHS/OKS are PROMs for assessing symptomatic pain and function following TJA. However, actual change in pre-operative/post-operative scores cannot distinguish patients of varying baseline symptom severity. The percentage of potential change (PoPC) is a simple method that accounts for this, expressing the actual change attained, as a percentage of the potential change possible. Measures are described using OHS/OKS at baseline and 6-months (1784 - TKA, 1523 - THA) from the Elective Orthopaedic Centre. Each method identified different proportions of patients as satisfied and importantly, the measures identified different patients. PoPC overcomes floor and ceiling effects and standardises measures to an easy to interpret -100 to +100 scale. In addition to actual change, we recommend using PoPC to assess the overall outcome of patients.
authors: NIHR Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK.
authors: Amit
authors: A
authors: Kiran
authors: NIHR Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK.
authors: David J
authors: DJ
authors: Hunter
authors: NIHR Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK; MRC Life course Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton, UK.
authors: Andrew
authors: A
authors: Judge
authors: Research & Education South West London Elective Orthopaedic Centre, Epsom, Surrey, UK; St. Helier Hospital, Carshalton, Surrey, UK.
authors: Richard E
authors: RE
authors: Field
authors: NIHR Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK; MRC Life course Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton, UK.
authors: M Kassim
authors: MK
authors: Javaid
authors: NIHR Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK; MRC Life course Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton, UK.
authors: Cyrus
authors: C
authors: Cooper
authors: NIHR Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK; MRC Life course Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton, UK.
authors: Nigel K
authors: NK
authors: Arden
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D008875:Middle Aged; D063868:Patient Outcome Assessment; D017060:Patient Satisfaction; D016059:Range of Motion, Articular; D016896:Treatment Outcome
keywords: Oxford Hip Score; Oxford Knee Score; PoPC; epidemiology; patient reported outcome measures; satisfaction