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The feasibility of a randomised control trial to assess physiotherapy against surgery for recurrent patellar instability

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Rahman, Usama, Gemperle Mannion, Elke, Qureshi, A., Edwin, Claire, Smith, Toby O., Parsons, Helen, Mason, James, Underwood, Martin, Eldridge, J., Thompson, P. and Metcalfe, Andrew John (2020) The feasibility of a randomised control trial to assess physiotherapy against surgery for recurrent patellar instability. Pilot Feasibility Studies, 6 (1). 94. doi:10.1186/s40814-020-00635-9

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Official URL: https://doi.org/10.1186/s40814-020-00635-9

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Abstract

Background
Patellar instability is a relatively common condition that leads to disability and restriction of activities. People with recurrent instability may be given the option of physiotherapy or surgery though this is largely driven by clinician preference rather than by a strong evidence base. We sought to determine the feasibility of conducting a definitive trial comparing physiotherapy with surgical treatment for people with recurrent patellar instability.

Methods
This was a pragmatic, open-label, two-arm feasibility randomised control trial (RCT) with an embedded interview component recruiting across three NHS sites comparing surgical treatment to a package of best conservative care; ‘Personalised Knee Therapy’ (PKT). The primary feasibility outcome was the recruitment rate per centre (expected rate 1 to 1.5 participants recruited each month). Secondary outcomes included the rate of follow-up (over 80% expected at 12 months) and a series of participant-reported outcomes taken at 3, 6 and 12 months following randomisation, including the Norwich Patellar Instability Score (NPIS), the Kujala Patellofemoral Disorder Score (KPDS), EuroQol-5D-5L, self-reported global assessment of change, satisfaction at each time point and resources use.

Results
We recruited 19 participants. Of these, 18 participants (95%) were followed-up at 12 months and 1 (5%) withdrew. One centre recruited at just over one case per month, one centre was unable to recruit, and one centre recruited at over one case per month after a change in participant screening approach. Ten participants were allocated into the PKT arm, with nine to the surgical arm. Mean Norwich Patellar Instability Score improved from 40.6 (standard deviation 22.1) to 28.2 (SD 25.4) from baseline to 12 months.

Conclusion
This feasibility trial identified a number of challenges and required a series of changes to ensure adequate recruitment and follow-up. These changes helped achieve a sufficient recruitment and follow-up rate. The revised trial design is feasible to be conducted as a definitive trial to answer this important clinical question for people with chronic patellar instability.

Item Type: Journal Article
Subjects: R Medicine > RD Surgery
R Medicine > RM Therapeutics. Pharmacology
Divisions: Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Clinical Trials Unit
Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Health Sciences
Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School
Library of Congress Subject Headings (LCSH): Patellofemoral joint , Patellofemoral joint -- Wounds and injuries -- Surgery, Patellofemoral joint -- Dislocation, Knee -- Wounds and injuries, Knee -- Wounds and injuries -- Treatment, Physical therapy
Journal or Publication Title: Pilot Feasibility Studies
Publisher: SpringerNature
ISSN: 2055-5784
Official Date: 6 July 2020
Dates:
DateEvent
6 July 2020Published
26 June 2020Accepted
Volume: 6
Number: 1
Article Number: 94
DOI: 10.1186/s40814-020-00635-9
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Copyright Holders: Springer Nature
Funder: West Midlands Clinical Research Network, The University Hospitals Coventry and Warwickshire, The University of Warwick Clinical Trials Unit
Grant number: University of Warwick Clinical Trials Unit
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIED[NIHR] National Institute for Health Researchhttp://dx.doi.org/10.13039/501100000272
UNSPECIFIEDUniversity of Warwickhttp://dx.doi.org/10.13039/501100000741

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