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Adverse childhood experiences: a meta-analysis of prevalence and moderators among half a million adults in 206 studies |
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| Authors: | Sheri Madigan Audrey-Ann Deneault Nicole Racine Julianna Park Raela Thiemann Jenney Zhu Gina Dimitropoulos Tyler Williamson Pasco Fearon Jude Mary Cénat Sheila McDonald Chloe Devereux Ross D. Neville |
| Affiliation: | 1. Department of Psychology, University of Calgary, Calgary, AB, Canada Alberta Children's Hospital Research Institute, Calgary, AB, Canada;2. School of Psychology, Faculty of Social Sciences, University of Ottawa, Ottawa, ON, Canada;3. Department of Psychology, University of Calgary, Calgary, AB, Canada;4. Alberta Children's Hospital Research Institute, Calgary, AB, Canada Faculty of Social Work, University of Calgary, Calgary, AB, Canada;5. Alberta Children's Hospital Research Institute, Calgary, AB, Canada Department of Community Health Sciences, Cummings School of Medicine, University of Calgary, Calgary, AB, Canada;6. Centre for Family Research, Department 7. of 8. Psychology, University 9. Cambridge, Cambridge, UK;10. Department of Paediatrics, Cummings School of Medicine, University of Calgary, Calgary, AB, Canada;11. School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland |
| Abstract: | Exposure to adverse childhood experiences (ACEs), including maltreatment and family dysfunction, is a major contributor to the global burden of disease and disability. With a large body of international literature on ACEs having emerged over the past 25 years, it is timely to now synthetize the available evidence to estimate the global prevalence of ACEs and, through a series of moderator analyses, determine which populations are at higher risk. We searched studies published between January 1, 1998 and August 5, 2021 in Medline, PsycINFO and Embase. Study inclusion criteria were using the 8- or 10-item ACE Questionnaire (±2 items), reporting the prevalence of ACEs in population samples of adults, and being published in English. The review protocol was registered with PROSPERO (CRD42022348429). In total, 206 studies (208 sample estimates) from 22 countries, with 546,458 adult participants, were included. The pooled prevalence of the five levels of ACEs was: 39.9% (95% CI: 29.8-49.2) for no ACE; 22.4% (95% CI: 14.1-30.6) for one ACE; 13.0% (95% CI: 6.5-19.8) for two ACEs; 8.7% (95% CI: 3.4-14.5) for three ACEs, and 16.1% (95% CI: 8.9-23.5) for four or more ACEs. In subsequent moderation analyses, there was strong evidence that the prevalence of 4+ ACEs was higher in populations with a history of a mental health condition (47.5%; 95% CI: 34.4-60.7) and with substance abuse or addiction (55.2%; 95% CI: 45.5-64.8), as well as in individuals from low-income households (40.5%; 95% CI: 32.9-48.4) and unhoused individuals (59.7%; 95% CI: 56.8-62.4). There was also good evidence that the prevalence of 4+ ACEs was larger in minoritized racial/ethnic groups, particularly when comparing study estimates in populations identifying as Indigenous/Native American (40.8%; 95% CI: 23.1-59.8) to those identifying as White (12.1%; 95% CI: 10.2-14.2) and Asian (5.6%; 95% CI: 2.4-10.2). Thus, ACEs are common in the general population, but there are disparities in their prevalence. They are among the principal antecedent threats to individual well-being and, as such, constitute a pressing social issue globally. Both prevention strategies and downstream interventions are needed to reduce the prevalence and mitigate the severity of the effects of ACEs and thereby reduce their deleterious health consequences on future generations. |
| Keywords: | Adverse childhood experiences mental health conditions substance abuse low-income households unhoused individuals racial/ethnic minorities |