Group Version of the UP-A in a Spanish Day Hospital for Adolescents.

This study aims to adapt the Spanish version of the UP-A for group delivery in an intensive treatment setting for adolescents with severe mental disorders within a day hospital of the Spanish public healthcare system. It also explores the feasibility and clinical utility of this adaptation through an uncontrolled study with pre-post and follow-up assessments (at 3, 6 and 12 months). The evaluation includes anxiety, depression, transdiagnostic variables, engagement, and satisfaction from adolescents, parents, and clinicians, as well as changes in adolescents' primary problems.

Anxiety and depression are among the most prevalent mental health disorders in adolescents, often co-occurring due to shared transdiagnostic factors such as poor emotion regulation, high negative affect, and cognitive avoidance. When severe, these disorders significantly increase the risk of self-harm and suicide, which is a leading cause of death among young people worldwide. Given these risks, it is crucial to develop interventions that effectively target these transdiagnostic mechanisms and improve access to treatment for adolescents with severe emotional disorders. The Unified Protocol for the Transdiagnostic Treatment of Emotional Disorders in Adolescents (UP-A) was designed to target neuroticism, a key vulnerability factor in emotional disorders. While the UP-A was originally developed as an individual treatment, its adaptation to a group format could enhance accessibility and optimize mental health resources. Although the UP has been successfully implemented in group settings for adults, there is limited research on the feasibility of a group-based UP-A intervention, particularly in clinical settings with adolescents experiencing severe mental health conditions. This study aims to adapt the Spanish version of the UP-A to a group format in an intensive treatment setting, specifically within a day hospital of the Spanish public healthcare system, where adolescents receive comprehensive, multidisciplinary care for severe emotional disorders. The study also explores the feasibility and clinical utility of this adaptation through an uncontrolled study, assessing pre-post and follow-up outcomes in two consecutive groups. The intervention consists of 16 weekly sessions, each lasting 60 to 90 minutes. The study evaluates changes in anxiety, depression, transdiagnostic variables (e.g., emotional avoidance, emotion regulation strategies), engagement, and satisfaction from the perspectives of adolescents, parents, and clinicians. Additionally, adolescents' self-rated primary problems and clinicians' assessments of overall clinical progress were analyzed. Follow-up assessments will be conducted 3, 6 and 12 months post-intervention to measure sustained effects.