Preventing Preschool Mental Health Problems: Population-Based Cluster Randomized Controlled Trial.

Area of Science:

• Child psychology and developmental interventions.
• Public health and preventive mental health.
• Parenting and family studies.

Background:

• Early prevention of child behavior problems is crucial for reducing later mental health issues.
• Evaluating population-level effectiveness of targeted versus universal parenting programs is essential.

Purpose of the Study:

• To compare the population-level effectiveness of a targeted prevention program, alone or combined with a universal parenting program, in reducing child behavior problems.
• To assess the impact on parenting behaviors and associated costs.

Main Methods:

• A three-arm, cluster randomized controlled trial involving 1353 primary caregivers and 8-month-old infants.
• Child behavior was assessed using the Child Behavior Checklist (CBCL) at ages 3 and 4.5 years.
• Parenting behaviors were measured via caregiver reports, including over-involved/protective parenting and harsh discipline.

Main Results:

• No statistically significant differences in child externalizing or internalizing behavior problems were found at ages 3 or 4.5 years between intervention and usual care groups.
• Both targeted and combined programs led to reduced over-involved/protective parenting and, for secondary caregivers, less harsh discipline.
• Program costs per family were A$218 for the targeted arm and A$682 for the combined arm.

Conclusions:

• When implemented by existing staff at the population level, these pre-existing parenting programs were ineffective in improving child behavior.
• The interventions demonstrated effectiveness in improving parenting practices, indicating a potential indirect pathway for future mental health benefits.
• Further research may be needed to optimize program delivery for enhanced child behavior outcomes.