Dialectical Behavior Therapy for Suicidal Self-Harming Youth: Emotion Regulation, Mechanisms, and Mediators

Area of Science:

• Psychiatry
• Clinical Psychology
• Adolescent Health

Background:

• Adolescent self-harm and suicidal ideation pose significant public health challenges.
• Dialectical Behavior Therapy (DBT) has shown promise, but its mechanisms and broader impact require further investigation.
• Understanding treatment mediators is crucial for optimizing interventions for at-risk youth.

Purpose of the Study:

• To evaluate the mechanisms, mediation, and secondary outcomes of DBT compared to Individual and Group Supportive Therapy (IGST) in adolescents.
• To examine the role of emotion regulation as a primary mechanistic outcome.
• To assess DBT's effectiveness on self-harm remission, substance misuse, and externalizing behaviors.

Main Methods:

• A multi-site randomized controlled trial involving 173 adolescents with a history of suicide attempts, self-harm, and suicidal ideation.
• Participants were randomized to 6 months of DBT or IGST, with outcomes monitored for 12 months.
• Youth emotion regulation was assessed as the primary mechanistic outcome, with mediation analyses conducted.

Main Results:

• DBT led to greater improvements in youth emotion regulation compared to IGST during treatment and follow-up.
• Parents in the DBT group reported increased use of DBT skills.
• DBT was associated with significantly higher self-harm remission rates (49.3% vs. 29.7%) during follow-up.
• Improvements in emotion regulation mediated the association between DBT and self-harm remission.
• Adolescents receiving DBT showed reduced substance misuse and externalizing behaviors.

Conclusions:

• Emotion regulation is a key target for reducing self-harm in adolescents.
• DBT demonstrates a significant advantage over IGST in promoting self-harm remission and improving behavioral outcomes.
• Findings support DBT as an effective intervention for adolescents with severe emotional dysregulation and self-harm behaviors.