Summary: Up to 40% of common, long-term mental health conditions in Australia—including anxiety, depression, and substance use disorders—can be traced back to childhood maltreatment. Researchers estimate that eliminating childhood abuse and neglect could prevent more than 1.8 million cases of these disorders and substantially reduce suicide, self-harm and overall years of healthy life lost.
The analysis attributes 41% of suicide attempts and 35% of self-harm cases nationally to childhood maltreatment. The findings underline the need to treat child abuse and neglect as a major public health issue and to adopt policy measures that reduce family stress and support early intervention.
Key Facts:
- Extensive Impact: Childhood maltreatment (physical, sexual, emotional abuse, or neglect before age 18) is a major contributor to lifetime mental health problems in Australia, including depression, anxiety, and self-harm.
- Preventive Potential: Eradicating childhood maltreatment could prevent over 1.8 million cases of depression, anxiety and substance use disorders and substantially lower the national burden of mental illness.
- Policy Recommendations: The study recommends population-level prevention policies—such as paid parental leave, affordable childcare, and income and mental health supports for caregivers—to reduce the prevalence of child maltreatment.
Source: University of Sydney
New national research finds childhood maltreatment causes a large share of mental health problems in Australia.
The study examined anxiety, depression, harmful alcohol and drug use, self-harm and suicide attempts. Childhood maltreatment was defined to include physical, sexual and emotional abuse, as well as emotional or physical neglect occurring before age 18.
Using meta-analytic causal estimates and national survey data, the authors report that childhood maltreatment accounts for 41% of suicide attempts, 35% of self-harm, and 21% of depression cases in Australia. These proportions reflect estimates adjusted to account for genetic and environmental confounding.
Published in JAMA Psychiatry, this is the first Australian study to estimate the proportion of mental health conditions causally attributable to childhood maltreatment. Lead author Dr Lucinda Grummitt of the University of Sydney’s Matilda Centre said the findings constitute a “wake-up call” to treat child abuse and neglect as a national public health priority.
“The results are devastating and are an urgent call to invest in prevention—not only targeted support for children and families, but broader policies to reduce the stress many families face,” Dr Grummitt said. The study suggests that strategic investments to prevent childhood maltreatment could avert millions of mental health cases across the population.
If childhood maltreatment were eliminated in Australia, the researchers estimate more than 1.8 million cases of depression, anxiety and substance use disorders could be prevented. For the year 2023 alone, eradication of maltreatment would have prevented an estimated 66,143 years of life lost (primarily through suicide) and 118,493 years lived with disability—totaling about 184,636 disability-adjusted life-years (DALYs) lost to mental health conditions.
The analysis drew on three large, nationally representative data sources: the Australian Child Maltreatment Study (ACMS) 2023 (around 8,500 participants), the National Study of Mental Health and Wellbeing 2020–2022 (about 15,893 participants), and the Australian Burden of Disease Study 2023. Causal effect estimates were derived from a meta-analysis of 34 quasi-experimental studies involving 54,646 participants, which allowed the authors to better isolate the contribution of maltreatment from other genetic or environmental influences.
Mental disorders are the leading cause of disease burden worldwide and affect an estimated 13% of the global population; in Australia, suicide is the leading cause of death among young people. Earlier, independent research found that more than half of Australians (about 53.8%) reported some form of maltreatment in childhood.
The study highlights both targeted and systemic interventions. While existing programs—such as child support services and parent education—can help children already experiencing maltreatment, the authors emphasize that the most sustainable reductions in maltreatment come from policies that ease financial and social pressures on families. Recommended measures include paid parental leave, affordable early childhood education and childcare, income supports such as JobSeeker, and improved access to mental health care for parents and caregivers.
The researchers note evidence from international examples, including the United States, where state-level paid parental leave and expanded access to subsidised childcare have been associated with lower child maltreatment rates. This supports the argument that structural policy changes can produce population-level benefits for child wellbeing and mental health.
About this childhood trauma and mental health research news
Author: Ivy Shih
Source: University of Sydney
Contact: Ivy Shih – University of Sydney
Image: Image credited to Neuroscience News
Original Research: Closed access. “Burden of Mental Disorders and Suicide Attributable to Childhood Maltreatment” by Lucinda Grummitt et al., JAMA Psychiatry.
Abstract
Burden of Mental Disorders and Suicide Attributable to Childhood Maltreatment
Importance
The proportion of mental disorders and associated burden that can be causally attributed to childhood maltreatment has been unclear at a national level.
Objective
To estimate the contribution of childhood maltreatment to mental health conditions in Australia while accounting for potential genetic and environmental confounding.
Design, Setting, and Participants
This study combined a meta-analysis of quasi-experimental research with three national cross-sectional surveys: the Australian Child Maltreatment Study (2023), the National Study of Mental Health and Wellbeing (2020–2022), and the Australian Burden of Disease Study (2023). Causal effect estimates from the meta-analysis were applied to national prevalence data to calculate population attributable fractions and the resulting number and burden of mental health conditions linked to childhood maltreatment.
Exposure
Physical abuse, sexual abuse, emotional abuse, or physical or emotional neglect before age 18.
Main Outcomes and Measures
Proportion and number of cases, years of life lost, years lived with disability, and disability-adjusted life-years (DALYs) for anxiety, depression, harmful alcohol and drug use, self-harm, and suicide attempts attributable to childhood maltreatment.
Results
Meta-analytic estimates based on 34 studies and 54,646 participants were applied to prevalence data from 8,503 Australians. Childhood maltreatment accounted for substantial proportions of mental health outcomes, from 21% (95% CI, 13%–28%) for depression to 41% (95% CI, 27%–54%) for suicide attempts. More than 1.8 million cases of depressive, anxiety, and substance use disorders could be prevented if childhood maltreatment were eliminated. The study estimates 66,143 years of life lost (95% CI, 43,313–87,314) and 184,636 DALYs (95% CI, 109,321–252,887) attributable to maltreatment-related mental health burden.
Conclusions and Relevance
These findings provide the first national estimates of the causal contribution of childhood maltreatment to mental health burden in Australia. They underscore the urgency of preventing child maltreatment through both targeted services and broad social policies to reduce the population prevalence and burden of mental disorders.