The Cognitive Behaviour Therapist (2020), vol. 13, e16, page 1 of 15 doi:10.1017/S1754470X20000173 ORIGINAL RESEARCH Improvement in IAPT outcomes over time: are they driven by changes in clinical practice? Rob Saunders1,* , John Cape1, Judy Leibowitz2, Elisa Aguirre3, Renuka Jena4, Mirko Cirkovic5, Jon Wheatley5, Nicole Main6, Stephen Pilling1,7, Joshua E.J. Buckman1,2 and On behalf of the NCEL IAPT SIRN‡ 1Centre for Outcomes Research and Effectiveness, Research Department of Clinical, Educational and Health Psychology, University College London, Gower Street, London, UK, 2iCope – Camden and Islington Psychological Therapies Services, Camden & Islington NHS Foundation Trust, London, UK, 3Redbridge Talking Therapies Service – North East London NHS Foundation Trust, London, UK, 4Waltham Forest IAPT and Redbridge Talking Therapies Service – North East London NHS Foundation Trust, London, UK, 5Talk Changes: City & Hackney IAPT Service, Homerton University Hospital NHS Foundation Trust, London, UK, 6Let’sTalkIAPT– Barnet, Enfield & Haringey Psychological Therapies Service, Barnet, Enfield & Haringey Mental Health Trust, London, UK and 7Camden & Islington NHS Foundation Trust, London, UK *Corresponding author. Email:
[email protected] (Received 21 October 2019; revised 04 February 2020; accepted 17 April 2020) Abstract Treatment outcomes across Improving Access to Psychological Therapies (IAPT) services in England have improved year-on-year, with the national average proportion of patients in recovery at the end of treatment now exceeding