Cumulative ACEs strongly linked to 3-fold higher odds of mental disorders
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Key Takeaway
Consider cumulative ACEs as a strong, independent risk factor for mental disorders (OR 3.18).
This systematic review and meta-analysis synthesized evidence from 56 studies (40 included in meta-analysis) examining the association between cumulative adverse childhood experiences (ACEs) and risk of mental disorders. The primary outcome was risk of any mental disorder.
The pooled analysis showed a strong association between cumulative ACEs and increased risk of mental disorders (OR=3.18, 95% CI: 2.84-3.56). The authors note that methodological factors such as study design, ACE measurement tools, and diagnostic approaches, as well as population characteristics including age, region, and disorder type, significantly moderated the associations.
Limitations include the observational nature of included studies, which precludes causal inference, and heterogeneity across studies. The authors emphasize the need for strengthening prevention efforts, trauma-informed care, and global equity in ACE research. Findings were robust across sensitivity analyses with minimal evidence of publication bias.
For clinicians, this meta-analysis reinforces the importance of screening for ACEs and considering their cumulative impact on mental health risk, though individual-level prediction remains limited by study-level data.
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View Original Abstract ↓
BACKGROUND: Adverse childhood experiences (ACEs) are consistently linked to poor mental health across the lifespan. However, the cumulative impact of multiple ACEs and the extent to which methodological and population factors shape these associations remain insufficiently synthesized.
METHODS: A systematic review and meta-analysis of 56 studies (40 in meta-analysis) was conducted following PRISMA 2020. Random-effects models estimated pooled odds ratios (ORs), dose-response patterns, and subgroup differences. Study quality, heterogeneity, publication bias, and sensitivity were rigorously assessed.
RESULTS: Cumulative ACEs were strongly associated with increased risk of mental disorders (pooled OR = 3.18, 95% CI: 2.84-3.56). A clear dose-response gradient emerged: risk rose steadily from 1 ACE to 4+ ACEs. Methodological factors (study design, ACE tools, diagnostic approaches) and population characteristics (age, region, disorder type) significantly moderated associations. Findings were robust across sensitivity tests with minimal publication bias.
CONCLUSION: ACEs exert a powerful, graded, and consistent influence on mental disorder risk. Strengthening prevention, trauma-informed care, and global equity in ACE research is essential.
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