Impact of Positive Childhood Experiences (PCEs): A Systematic Review of Longitudinal Studies.
Kannan Kallapiran, Shuichi Suetani, Vanessa Cobham et al.
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In 30 seconds
This systematic review examined longitudinal studies of cumulative positive childhood experiences (PCEs) and later health and behavioral outcomes. Searches identified eight publications from five studies, including 16,451 participants; three studies assessed adolescent outcomes only. Greater PCE exposure was associated with lower rates of depression, substance use, delinquent and risky sexual behavior, persistent insomnia, and lower inflammatory markers. The review also suggests that PCEs may moderate the association between adverse childhood experiences (ACEs) and later outcomes, but the findings are observational and do not establish causation.
Key findings
- The review included eight publications from five longitudinal studies, with 16,451 participants.
- PCEs were associated with reduced rates of depression, substance use, delinquent behavior, risky sexual behavior, and persistent insomnia.
- Higher PCE exposure was associated with lower inflammatory markers.
- Childhood PCEs may moderate the impact of ACEs on later mental health and other adverse outcomes.
Why it matters
The findings broaden the focus from childhood adversity alone to potentially protective experiences. Longitudinal evidence linking PCEs with mental, behavioral, sleep, and inflammatory outcomes supports further attention to positive childhood contexts in research on later health. Because the evidence is observational, it cannot show that increasing PCEs would itself prevent these outcomes.
What to keep in mind
The evidence base comprised only five longitudinal studies, and three focused exclusively on adolescent outcomes. The reported associations do not establish causation.