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    Treating common mental disorder including psychotic experiences in the primary care improving access to psychological therapies programme (the TYPPEX study): protocol for a stepped wedge cluster randomised controlled trial with nested economic and process evaluation of a training package for therapists

    Ashford, Polly-Anna, Knight, Clare, Heslin, Margaret, Clark, Allan B, Kanaan, Mona, Patel, Ushma, Stuart, Freya, Kabir, Thomas, Grey, Nick, Murray, Hannah, Hodgekins, J, Reeve, Nesta, Marshall, Nicola, Painter, Michelle, Clarke, James, Russo, Debra, Stochl, Jan, Leathersich, Maria, Pond, Martin, Fowler, David, French, Paul ORCID logoORCID: https://orcid.org/0000-0003-4300-387X, Swart, Ann Marie, Dixon-Woods, Mary ORCID logoORCID: https://orcid.org/0000-0002-5915-0041, Byford, Sarah ORCID logoORCID: https://orcid.org/0000-0001-7084-1495, Jones, Peter B ORCID logoORCID: https://orcid.org/0000-0002-0387-880X and Perez, Jesus ORCID logoORCID: https://orcid.org/0000-0003-0740-190X (2022) Treating common mental disorder including psychotic experiences in the primary care improving access to psychological therapies programme (the TYPPEX study): protocol for a stepped wedge cluster randomised controlled trial with nested economic and process evaluation of a training package for therapists. BMJ Open, 12 (6). e056355. ISSN 2044-6055

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    Abstract

    Introduction At least one in four people treated by the primary care improving access to psychological therapies (IAPT) programme in England experiences distressing psychotic experiences (PE) in addition to common mental disorder (CMD). These individuals are less likely to achieve recovery. IAPT services do not routinely screen for nor offer specific treatments for CMD including PE. The Tailoring evidence-based psychological therapY for People with common mental disorder including Psychotic EXperiences study will evaluate the clinical and cost-effectiveness of an enhanced training for cognitive behavioural therapists that aims to address this clinical gap. Methods and analysis This is a multisite, stepped-wedge cluster randomised controlled trial. The setting will be IAPT services within three mental health trusts. The participants will be (1) 56-80 qualified IAPT cognitive behavioural therapists and (2) 600 service users who are triaged as appropriate for cognitive behavioural therapy in an IAPT service and have PE according to the Community Assessment of Psychic Experiences - Positive 15-items Scale. IAPT therapists will be grouped into eight study clusters subsequently randomised to the control-intervention sequence. We will obtain pseudonymous clinical outcome data from IAPT clinical records for eligible service users. We will invite service users to complete health economic measures at baseline, 3, 6, 9 and 12-month follow-up. The primary outcome will be the proportion of patients with common mental disorder psychotic experiences who have recovered by the end of treatment as measured by the official IAPT measure for recovery. Ethics and dissemination The study received the following approvals: South Central - Berkshire Research Ethics Committee on 28 April 2020 (REC reference 20/SC/0135) and Health Research Authority (HRA) on 23 June 2020. An amendment was approved by the Ethics Committee on 01 October 2020 and HRA on 27 October 2020. Results will be made available to patients and the public, the funders, stakeholders in the IAPT services and other researchers. Trial registration number ISRCTN93895792.

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