Imprisonment and Mortality Among Adults with Neurodevelopmental Disabilities

Strategic Insights -

A recent study has shed light on the alarming association between imprisonment and mortality among adults with neurodevelopmental disabilities in New South Wales, Australia. According to the research, adults with neurodevelopmental disabilities who were released from prison had a significantly higher risk of mortality compared to their peers who had not been imprisoned. The study highlights the pressing need for comprehensive policy and service system responses to address the complex needs of individuals with neurodevelopmental disabilities, including mental illness, substance use, and physical comorbidity.

Key Takeaways:

  • The study examined the associations between imprisonment history and mortality among adults with neurodevelopmental disabilities in New South Wales, Australia.
  • The research found that among adults with neurodevelopmental disabilities, mortality was increased among those released from prison compared with their peers who had not been imprisoned.
  • The increased mortality risk was largely explained by health-related factors, including mental illness, substance use, and physical comorbidity.
  • The study concluded that comprehensive policy and service system responses are required to meet the health and safety needs of people with neurodevelopmental disabilities who have complex needs.
  • The study involved 67,217 adults aged 18 years (59.1% male) with one or more neurodevelopmental disabilities in New South Wales, Australia, from July 2001 to June 2015.
  • The main outcome measure was all-cause mortality, which was examined using Cox regression analysis.

Statistics:

  • 3.3% of participants (n=2214) were imprisoned and released at least once during follow-up.
  • The study found that mortality was increased among those released from prison compared with their peers who had not been imprisoned (hazard ratio: 1.34, 95% CI: 1.23-1.45).
  • Mental illness, substance use, and physical comorbidity explained 39.5% of the increased mortality risk among adults with neurodevelopmental disabilities released from prison.

Sources:

  • Imprisonment and mortality among adults with neurodevelopmental disabilities in New South Wales, Australia, 2001-2015: a data-linkage cohort study. BMJ Open, 2025,15(10).
  • NewsRx. New Mental Health Diseases and Conditions Findings from University of New South Wales Described (Imprisonment and mortality among adults with neurodevelopmental disabilities in New South Wales, Australia, 2001-2015: a data-linkage cohort study). Mental Health Law Weekly. November 1, 2025; p 561.