This meta-analysis looked at psychological interventions for people with subclinical symptoms of major depression or first-episode psychosis. It combined results from 30 trials involving 7,201 participants. The review found that these interventions reduced the incidence of major depression by 43% at the end of treatment and by 33% at a 12-month follow-up. It also found that shorter duration of untreated illness was associated with a 70% greater likelihood of treatment response, and that early intervention for first-episode psychosis reduced hospitalizations by 26%.
The review did not report specific safety data, such as adverse events or discontinuations. The main reason to be careful is that the evidence comes from a meta-analysis, which synthesizes existing studies but cannot prove cause and effect. The findings are based on associations, and the review presents a speculative monitoring protocol that needs further testing.
Readers should understand that this is a summary of existing research, not new clinical guidance. The results suggest that early psychological support may help reduce depression risk and improve outcomes for some people, but more research is needed to confirm these effects and to understand who benefits most.