University of Sydney Nov 18 2025 A University of Sydney-led study published today has found 42 percent of Australian adults - more than eight million people - experienced a traumatic event as children. Those affected have a 50 percent higher risk of developing a mental health or substance use disorder than the wider population, the research found. They are more likely to experience anxiety, depression or panic disorder later in life, with more than one in ten projected to attempt suicide. The