Few negative effects of psychotherapy in a psychiatric day hospital: a follow-up survey to a multiprofessional treatment with acceptance and commitment therapy.

"Conflict of interest CR is the head physician and behavioral therapist. RR worked as a Vivantes employee for the evaluation during data collection and analysis. Previously, she had worked as a psychologist in the day clinic during the implementation of the therapy program. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be constructed as a potential conflict of interest."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article. We acknowledge financial support from the Open Access Publication Fund of Charité – Universitätsmedizin Berlin and Vivantes GmbH. No further external funding."

"This study was conducted within the framework of a scientific evaluation trial of an ACT-based multidisciplinary treatment in a psychiatric day hospital (). The investigation was carried out in accordance with the Declaration of Helsinki (2013). The study was approved by the Ethics Committee of the Medical Association Berlin (12th February 2020, case number Eth-03/20) and was retrospectively registered in the German Clinical Trials Register (http://www.drks.de/DRKS00029992, identifier: DRKS00029992) on August 19th, 2022. All participants in the study gave written informed consent after the nature of the procedures had been fully explained."