This study investigates whether treating childhood psychopathology with community mental health services can reduce the risk of adult psychopathology, a concept referred to as the “intervention as prevention” hypothesis. Conducted on 1,420 children who were followed from ages 9-16 (with 6,674 observations) for their psychiatric status and use of specialty mental health services, and then again in adulthood at ages 19, 21, 25, and 30 (with 4,556 observations of 1,336 participants), the research aimed to assess the impact of childhood mental health treatment on adult mental health outcomes.