Transdiagnostic versus disorder-specific and clinician-guided versus self-guided internet-delivered treatment for generalized anxiety disorder and comorbid disorders: A randomized controlled trial

Dear, B. and Staples, L. and Terides, M. and Karin, E. and Zou, J. and Johnston, L. and Gandy, M. et al. 2015. Transdiagnostic versus disorder-specific and clinician-guided versus self-guided internet-delivered treatment for generalized anxiety disorder and comorbid disorders: A randomized controlled trial. Journal of Anxiety Disorders. 36: pp. 63-77.

Source Title

Journal of Anxiety Disorders

DOI

10.1016/j.janxdis.2015.09.003

ISSN

0887-6185

School

School of Psychology and Speech Pathology

URI

http://hdl.handle.net/20.500.11937/3449

Collection

Curtin Research Publications

Abstract

© 2015 Z. Generalized anxiety disorder (GAD) can be treated effectively with either disorder-specific cognitive behavior therapy (DS-CBT) or transdiagnostic CBT (TD-CBT). The relative benefits of DS-CBT and TD-CBT for GAD and the relative benefits of delivering treatment in clinician guided (CG-CBT) and self-guided (SG-CBT) formats have not been examined. Participants with GAD (n= 338) were randomly allocated to receive an internet-delivered TD-CBT or DS-CBT intervention delivered in either CG-CBT or SG-CBT formats. Large reductions in symptoms of GAD (Cohen's d= 1.48; avg reduction = 50%) and comorbid major depressive disorder (Cohen's d= 1.64; avg reduction = 45%), social anxiety disorder (Cohen's d= 0.80; avg reduction = 29%) and panic disorder (Cohen's d= 0.55; avg reduction = 33%) were found across the conditions. No substantive differences were observed between DS-CBT and TD-CBT or CG-CBT and SG-CBT, highlighting the public health potential of carefully developed TD-CBT and SG-CBT.