Treatment integrity is crucial for a sound evaluation of face-to-face psychological interventions. A working group headed by the Institute for Complementary and Integrative Medicine (Director: Prof. Dr. med. Claudia Witt) identified 50 items to be reported in papers to increase transparency about the delivery of such interventions in clinical studies. Based on TIDieR, survey data, and an expert panel, this work was published in the Journal of Clinical Epidemiology. The EQUATOR Network also acknowledged the importance of our work and included RIPI-f as reporting guideline.

The so-called RIPI-f-checklist enhances TIDieR with important extensions, such as therapeutic alliance, provider's allegiance, and the adherence of providers and participants. For systematic reviewers, RIPI-f could serve as a basis to assess performance bias or to interpret heterogeneity in study results. This project was conducted within the CAM satellite Switzerland.