High risk cohort study for psychiatric disorders in childhood: rationale, design, methods and preliminary results

Area of Science:

• Child Psychiatry
• Developmental Psychology
• Epidemiology

Background:

• Childhood psychiatric disorders represent a significant public health concern.
• Accurate identification of at-risk children is crucial for early intervention.
• Existing cohort studies may lack sufficient representation of psychopathology.

Purpose of the Study:

• To outline the methodology and present preliminary findings of a cohort study focused on childhood psychiatric disorders.
• To evaluate the effectiveness of an oversampling strategy in recruiting families with psychopathology.
• To assess the reliability of diagnostic instruments and the efficacy of screening procedures.

Main Methods:

• A large-scale screening of 9937 children across 57 schools was conducted.
• Diagnostic evaluations were performed on 2512 children (random and high-risk strata).
• Oversampling procedures, diagnostic instruments, and interrater reliability were assessed.

Main Results:

• The prevalence of child mental disorders was 19.9% in the random sample and 29.7% in the high-risk sample.
• Oversampling successfully increased the recruitment of families with mental disorders.
• High interrater reliability (kappa 0.72-0.84) was achieved for diagnostic instruments.

Conclusions:

• The study demonstrates the efficacy of oversampling and screening in identifying children at high risk for psychiatric disorders.
• The methodology provides a robust framework for future research in child psychopathology.
• Findings support the advancement of early detection and intervention strategies in child psychiatry.