A Comprehensive Evaluation of a Universal School-Based Depression Prevention Program for Adolescents

Area of Science:

• Psychology
• Public Health
• Education

Background:

• School-based programs are crucial for adolescent mental health.
• Evaluating depression prevention programs requires robust frameworks.
• Understanding intervention effects on change agents is important.

Purpose of the Study:

• To propose and demonstrate a comprehensive evaluation framework for a universal school-based depression prevention program.
• To assess the impact of continuous versus categorical outcome operationalization.
• To examine intervention effects on key change agent variables and moderation by baseline symptom severity.

Main Methods:

• A school-based randomized controlled trial with 252 adolescents (aged 13-17) in Victoria, Australia.
• Comparison of a waitlist-control group (n=88) with a Cognitive Behavioral Therapy (CBT)-based intervention group (n=164).
• Intervention consisted of six weekly 45-minute sessions during wellbeing classes; evaluation included symptom severity, self-esteem, resilience, body image, and social support.

Main Results:

• No significant average difference in symptom improvement between intervention and control groups post-intervention.
• High variability in intervention responsiveness; adolescents with elevated baseline depressive symptoms showed the greatest benefit.
• Change agent variables (self-esteem, resilience, body image, social support) did not uniquely predict symptom change but collectively explained significant variance.

Conclusions:

• The developed framework offers valuable insights into program efficacy and areas for improvement.
• Targeting interventions for adolescents with higher baseline depressive symptoms may enhance effectiveness.
• Future research should refine evaluation methods and explore the collective impact of change agents in depression prevention.