[Obsessive-compulsive Disorder: Exposure Treatment and special Features of concentrated Treatment].

Obsessive-compulsive disorder (OCD) is often associated with great suffering for both the affected individual as well as their relatives. The treatment of choice for OCD is cognitive behavioural therapy (CBT) with exposure and response prevention. Exposurebased treatment is offered in a concentrated, high-frequency format over four consecutive days in the Bergen 4-Day Treatment (B4DT). This article presents the procedure and effectiveness of this concentrated exposure treatment.