Anxiety, depressive and substance use disorders account for three quarters of the disability attributed to mental disorders. Moreover, research indicates that these disorders are often comorbid, share common risk factors and interact. The peak of these disorders occurs in those aged 15-24 years old, which also corresponds with the typical period of onset. It is therefore important that effective preventative interventions begin early, before patterns of mental health and substance use disorder symptoms are established and begin to cause disability, as well as vocational, educational and social harm.
An array of preventative interventions for these disorders currently exists, however the effectiveness of these programs is contentious. Furthermore, interventions are typically designed to target a single disorder at one time and there are few effective preventive programs which concurrently target these common disorders. The current study aims to address this gap by evaluating an integrative approach known as the CLIMATE Schools Combined (CSC) intervention, which includes the evidence-based ‘universal’ CLIMATE Schools Substance Use course and the ‘universal’ CLIMATE Schools Mental Health course. It is anticipated that this integrative approach will be more effective in reducing problems and symptoms associated with substance use and mental health disorders compared to the stand-alone interventions and school-based health education as usual. The CSC study will be the first trial, internationally, to develop an integrative model for dissemination in schools across Australia.