Original Investigation

Concentrated Exposure Therapy vs Internet-Based Cognitive Behavioral Therapy for Obsessive-Compulsive Disorder

JAMA Network Open 10.1001/jamanetworkopen.2026.39281

October 19, 2026 at 11:00 AM EDT

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In this randomized clinical trial of 119 adults with OCD, B4DT was superior to iCBT in reducing OCD symptom severity, with sustained benefits. Its brief, concentrated format may represent a scalable strategy to improve access to effective OCD treatment globally.

Corresponding Authors: Lena Jelinek, PhD (l.jelinek@uke.de), and Lara Wille, MSc (la.wille@uke.de), University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany.

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