A study published in the Australian and New Zealand Journal of Psychiatry estimates that up to 42% of Australians, approximately 8.25 million people, have been exposed to potentially traumatic events during childhood. Common traumatic experiences include the unexpected death of a loved one (27.5%), witnessing domestic violence (21.1%), sexual assault (21.0%), and witnessing serious injury or death (20.0%). The research analyzed survey data from the National Survey of Mental Health and Wellbeing, involving 15,893 Australians aged 16 to 85 years.

The findings indicate that individuals who experienced childhood trauma had significantly higher odds of developing mental disorders, with an adjusted odds ratio of 1.51. Additionally, they were more likely to have suicidal thoughts, plans, and attempts, with odds ratios of 1.57, 1.60, and 2.04, respectively. There was also a notable association between childhood trauma and long-term physical health issues, including asthma, arthritis, cancer, and kidney disease. The study emphasizes the need for early detection and trauma-informed healthcare approaches, highlighting the importance of addressing these issues within health, education, and social service systems.