Acceptability and preliminary effectiveness of the Unified Protocol in blended format in the Spanish public mental health system: Results from a Pilot Randomized Controlled Trial

This study suggests that the UP + APP may be as effective as TAU for ED in the SNHS. However, high dropout rates and low adherence to the UP-App constrain these results. Future research should explore a modified implementation format of the UP + APP ensuring a greater presence of the therapist, as well as an updated version of the UP-App incorporating feedback from the current study and new functionalities, in an RCT with a larger sample, as well as comparing standard UP vs UP + APP to determine the unique contribution of the UP-App on effectiveness, adherence, and user experience with UP.<b>Trial registration:</b>ClinicalTrials.gov identifier: NCT04304911.