Early intervention is critical for addressing child and youth mental disorders. This project aims to expand evidence on early intervention by examining the temporal dynamics of mental disorders occurring in childhood and youth. Leveraging Finnish nationwide registers, the study covers over 3.1 million individuals born 1975–2023, residing in Finland between 1998–2024. Key objectives include quantifying the temporal patterns in the development of within-individual comorbidity of mental disorders in childhood and youth, and the economic and health-related risks associated with comorbidity and developmental timing of mental disorders. Additionally, the project aims to develop a series of risk prediction models to improve targeting children and youth at risk of progressing to severe courses of mental illness. The results are expected to significantly extend and elaborate current evidence on early-intervention and offer pragmatic value in screening and targeting at-risk children and youth.

2025

2029