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Open Access Study protocol

Obsessive Compulsive Treatment Efficacy Trial (OCTET) comparing the clinical and cost effectiveness of self-managed therapies: study protocol for a randomised controlled trial

Judith Gellatly, Peter Bower, Dean McMillan, Christopher Roberts, Sarah Byford, Penny Bee, Simon Gilbody, Catherine Arundel, Gillian Hardy, Michael Barkham, Shirley Reynolds, Lina Gega, Patricia Mottram, Nicola Lidbetter, Rebecca Pedley, Emily Peckham, Janice Connell, Jo Molle, Neil O¿Leary and Karina Lovell

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Trials 2014, 15:278  doi:10.1186/1745-6215-15-278

Published: 10 July 2014

Abstract (provisional)


UK National Institute of Health and Clinical Excellence guidelines for obsessive compulsive disorder (OCD) specify recommendations for the treatment and management of OCD using a stepped care approach. Steps three to six of this model recommend treatment options for people with OCD that range from low-intensity guided self-help (GSH) to more intensive psychological and pharmacological interventions. Cognitive behavioural therapy (CBT), including exposure and response prevention, is the recommended psychological treatment. However, whilst there is some preliminary evidence that self-managed therapy packages for OCD can be effective, a more robust evidence base of their clinical and cost effectiveness and acceptability is required.


Our proposed study will test two different self-help treatments for OCD: 1) computerised CBT (cCBT) using OCFighter, an internet-delivered OCD treatment package; and 2) GSH using a book. Both treatments will be accompanied by email or telephone support from a mental health professional. We will evaluate the effectiveness, cost and patient and health professional acceptability of the treatments.


This study will provide more robust evidence of efficacy, cost effectiveness and acceptability of self-help treatments for OCD. If cCBT and/or GSH prove effective, it will provide additional, more accessible treatment options for people with OCD. Trial registration Current Controlled Trials: ISRCTN73535163. Date of registration: 5 April 2011

The complete article is available as a provisional PDF. The fully formatted PDF and HTML versions are in production.