The STAR care pathway for patients with chronic pain after total knee replacement: four-year follow-up of a randomised controlled trial

Wendy Bertram, Vikki Wylde, Nick Howells, Beverly Shirkey, Tim J. Peters, Liang Zhu, Sian Noble, Emma Johnson, Andrew D. Beswick, Andrew Moore, Julie Bruce, David Walsh, Christopher Eccleston, Rachael Gooberman-Hill

Research output: Contribution to journalArticlepeer-review

Abstract

Background: The Support and Treatment After Replacement (STAR) care pathway is a clinically important and cost-effective intervention found to improve pain outcomes over one year for people with chronic pain three months after total knee replacement (TKR). We followed up STAR trial participants to evaluate the longer-term clinical- and cost-effectiveness of this care pathway. Methods: Participants who remained enrolled on the trial at one year were contacted by post at a median of four years after randomisation and invited to complete a questionnaire comprising the same outcomes collected during the trial. We captured pain (co-primary outcome using the Brief Pain Inventory (BPI) pain severity and interference scales; scored 0–10, best to worst), function, neuropathic characteristics, emotional aspects of pain, health-related quality of life, and satisfaction. Electronic hospital informatics data on hospital resource use for the period of one to four years post-randomisation were collected from participating hospital sites. The economic evaluation took an National Health Service (NHS) secondary care perspective, with a four-year time horizon. Results: Overall, 226/337 (67%) of participants returned completed follow-up questionnaires, yielding adjusted between-group differences in BPI means of -0.42 (95% confidence interval, CI (-1.07, 0.23); p = 0.20) for pain severity and − 0.64 (95% CI -1.41, 0.12); p = 0.10) for pain interference. Analysis using a multiple imputed data set (n = 337) showed an incremental net monetary benefit in favour of the STAR care pathway of £3,525 (95% CI -£990 to £8,039) at a £20,000/QALY willingness-to-pay threshold, leading to a probability that the intervention was cost-effective of 0.94. Conclusions: The magnitude of the longer-term benefits of the STAR care pathway are uncertain due to attrition of trial participants; however, there is a suggestion of some degree of sustained clinical benefit at four years. The care pathway remained cost-effective at four years. Trial registration: ISRCTN: 92,545,361.

Original languageEnglish
Article number972
JournalBMC Musculoskeletal Disorders
Volume24
Issue number1
Early online date16 Dec 2023
DOIs
Publication statusPublished - 16 Dec 2023

Acknowledgements

The STAR team acknowledges the following people for their help and input into the STAR follow-up study: Leigh Morrison, Gemma Munkenbeck, Christine Hobson, Paolo Buscemi, the STAR Patient Advisory Group and the Patient Experience Partnership in Research (PEP-R) group. We also thank colleagues at Versus Arthritis for their support.

The research team acknowledges the support of the NIHR, through the Clinical Research Network. This work was also supported by the NIHR Biomedical Research Centre at University Hospitals Bristol and Weston NHS Foundation Trust and the University of Bristol. The views expressed are those of the authors and not necessarily those of the NIHR or the Department of Health and Social Care. The Bristol Trials Centre (formed through a merger of the Bristol Randomised Trials Collaboration with another UK Clinical Research Collaboration registered Clinical Trials Unit [CTU]) receives NIHR CTU Support Funding to underpin the development and conduct of NIHR-funded trials. JB is supported by NIHR Research Capability Funding via University Hospitals Coventry and the Warwickshire NHS Trust.

Keywords

  • Care pathway
  • Chronic post-surgical pain
  • Osteoarthritis
  • Total knee replacement

ASJC Scopus subject areas

  • Rheumatology
  • Orthopedics and Sports Medicine

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