The study, based on a decade of national police records, hospitalisations and child protection data, found sexual assault of girls aged up to nine rose 2.8% per year and of girls aged 10 to 17 rose 4.2% per year. Among boys aged 10 to 17, the rate rose 15.7% after an acceleration that began in 2021. Family violence-related assault followed a similar pattern: stable to modest increases before 2021, then steep increases. Assault-related hospitalisations and child maltreatment were generally stable.
The researchers said they expected rates to have fallen in line with trends in other high-income countries. Lead author Dr Lucy Grummitt said the increase could not be attributed to any one factor but showed the need for a less siloed approach.
"All these different departments that are involved in the bigger picture of violence against children are just focused on one particular subset, and we don't actually have a very clear picture of what young people are being exposed to, and how has that changed over the last decade," she said.
The authors pointed to several possible drivers, including income inequality, which they said is at its highest point in 20 years, and the end of pandemic-era support such as JobKeeper in March 2021. They also cited the expansion of misogynistic online communities and broader toxic masculinity narratives, alongside resurging traditional gender attitudes among young men. Increased reporting due to growing awareness could also partly explain the higher rates, the study found.