de Haan A, Meiser-Stedman R, Landolt MA, Kuhn I, Black MJ, Klaus K, Patel SD, Fisher DJ, Haag C, Ukoumunne OC, Jones BG, Flaiyah AM, Catani C, Dawson K, Bryant RA, de Roos C, Ertl V, Foa EB, Ford JD, Gilboa-Schechtman E, Tutus D, Hermenau K, Hecker T, Hultmann O, Axberg U, Jaberghaderi N, Jensen TK, Ormhaug SM, Kenardy J, Lindauer RJL, Diehle J, Murray LK, Kane JC, Peltonen K, Kangaslampi S, Robjant K, Koebach A, Rosner R, Rossouw J, Smith P, Tonge BJ, Hitchcock C, and Dalgleish T
Background: Existing clinical trials of cognitive behavioural therapies with a trauma focus (CBTs-TF) are underpowered to examine key variables that might moderate treatment effects. We aimed to determine the efficacy of CBTs-TF for young people, relative to passive and active control conditions, and elucidate putative individual-level and treatment-level moderators., Methods: This was an individual participant data meta-analysis of published and unpublished randomised studies in young people aged 6-18 years exposed to trauma. We included studies identified by the latest UK National Institute of Health and Care Excellence guidelines (completed on Jan 29, 2018) and updated their search. The search strategy included database searches restricted to publications between Jan 1, 2018, and Nov 12, 2019; grey literature search of trial registries ClinicalTrials.gov and ISRCTN; preprint archives PsyArXiv and bioRxiv; and use of social media and emails to key authors to identify any unpublished datasets. The primary outcome was post-traumatic stress symptoms after treatment (<1 month after the final session). Predominantly, one-stage random-effects models were fitted. This study is registered with PROSPERO, CRD42019151954., Findings: We identified 38 studies; 25 studies provided individual participant data, comprising 1686 young people (mean age 13·65 years [SD 3·01]), with 802 receiving CBTs-TF and 884 a control condition. The risk-of-bias assessment indicated five studies as low risk and 20 studies with some concerns. Participants who received CBTs-TF had lower mean post-traumatic stress symptoms after treatment than those who received the control conditions, after adjusting for post-traumatic stress symptoms before treatment (b=-13·17, 95% CI -17·84 to -8·50, p<0·001, τ 2 =103·72). Moderation analysis indicated that this effect of CBTs-TF on post-traumatic stress symptoms post-treatment increased by 0·15 units (b=-0·15, 95% CI -0·29 to -0·01, p=0·041, τ 2 =0·03) for each unit increase in pre-treatment post-traumatic stress symptoms., Interpretation: This is the first individual participant data meta-analysis of young people exposed to trauma. Our findings support CBTs-TF as the first-line treatment, irrespective of age, gender, trauma characteristics, or carer involvement in treatment, with particular benefits for those with higher initial distress., Funding: Swiss National Science Foundation., Competing Interests: Declaration of interests RM-S received personal payment for teaching on the delivery of cognitive therapy for post-traumatic stress disorder for children and young people at various UK universities and training bodies, and he is an unpaid council member of the UK Trauma Council. EBF received payment for contributing to a post-traumatic stress disorder manual and workbook and for post-traumatic stress disorder workshops, lectures, and meetings. JDF served as a consultant for Advanced Trauma Solutions Professionals. SK received minor side income from lecturing in a clinical training program for Narrative Exposure Therapy (University of Turku, Turku, Finland). PS received a share of royalties from Routledge publishers from publication of a cognitive therapy for post-traumatic stress disorder manual for young people; he was an unpaid member of the research committee of the Children and War Foundation (a non-profit based in Norway) and an unpaid trustee of the Children and War UK (a non-profit based in the UK). CHi received personal payment for writing an article regarding treatment of therapy for post-traumatic stress disorder in preschool-aged children from the Aeon Media Group. TD received personal payment for teaching on the delivery of cognitive therapy for post-traumatic stress disorder for children and young people at various UK universities and training bodies. All other authors declare no competing interests., (Copyright © 2024 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license. Published by Elsevier Ltd.. All rights reserved.)