3.22 Meta-Analysis of the Outcome of RCTs of Preventative or Early Intervention Universal Group Psychological Therapies in Under 18s

School-based interventions aiming to intervene early in mental disorder in young people have been tested since the 1990s. Most previous reviews looked at both targeted and universal interventions; we have only compared randomized controlled trials of universal interventions, considering them as an implementable preventative intervention at a public health level. We have included other outcomes of therapy, such as self-esteem, well-being, resilience, and mentalization, to also compare the effectiveness of interventions on outcomes that appear to be associated with prevention.