Habit Reversal Training and Variants of Decoupling for Use in Body-Focused Repetitive Behaviors. A Randomized Controlled Trial.

"Declarations Conflict of InterestSteffen Moritz, Danielle Penney, Alina Bruhns, Sarah Weidinger and Stella Schmotz declare that they have no conflict of interest. Ethical Approval and Informed ConsentThe ethics committee of the University Medical Center Hamburg (LPEK, psychology) approved the study and informed electronic consent from all participants was obtained. The study was conducted in accordance with the 1964 Helsinki Declaration. Human and Animal RightsNo animal studies were carried out by the authors for this article. Conflict of Interest Steffen Moritz, Danielle Penney, Alina Bruhns, Sarah Weidinger and Stella Schmotz declare that they have no conflict of interest."

"Funding Open Access funding enabled and organized by Projekt DEAL. This research received no specific grant from any funding agency, commercial or not-for-profit sectors."

"The study was posted on Facebook forums and topic-related German websites as an unguided treatment study for individuals with BFRBs. Individuals were randomly allocated to one of three treatment conditions or to a waitlist control group (allocation: 1:1:1:1). The three treatment conditions only differed in the order that manuals were received. Inclusion criteria were to be between 18 and 75 years old with at least one current self-reported BFRB. All genders were included. As the study was conducted in German, sufficient command of the German language was required. Concurrent treatments (e.g., medication, other self-help interventions, and psychotherapy) were tolerated. The trial was registered with the German Clinical Trials Register (DRKS00024526). Ethical approval was obtained from the local ethics committee for psychologists at the University Hospital of Hamburg-Eppendorf (Germany, LPEK-0249). The study was not externally funded. Sample size calculation relied on g*power; to detect a medium effect size at an alpha-level of 0.05 and a beta of 0.8 a sample size of 80 individuals per condition was required."