Disproportionate Mental Illness Prevalence in Intellectual Disability Population

Strategic Insights -

People with intellectual disabilities are more likely to experience mental illness, including serious mental illness, than the general population. A recent study conducted in New South Wales, Australia, aimed to identify factors associated with the onset of mental illness and serious mental illness in individuals with intellectual disabilities. The study found that nearly half of the cohort experienced any mental illness, and 11.7% experienced serious mental illness. The findings emphasized the need for early identification and targeted interventions to improve mental health outcomes in this high-risk population.

Key Takeaways:

  • A retrospective cohort study of 47,330 individuals with intellectual disabilities aged 13-80 years found that nearly half (48.9%) experienced any mental illness, and 11.7% experienced serious mental illness.
  • Factors associated with any mental illness included attention-deficit/hyperactivity disorder, learning disorders, physical comorbidities, and living in areas of greater socioeconomic disadvantage.
  • Serious mental illness onset was associated with living in outer regional, remote or very remote areas, attention-deficit/hyperactivity disorder, learning disorders, male sex, and a history of any mental illness.
  • The study's findings highlight the need for early identification and targeted interventions to improve mental health outcomes in individuals with intellectual disabilities.
  • The study used linked administrative data from 2004 to 2018 to track first recorded contact with mental health services for any mental illness and serious mental illness.

Statistics:

  • 48.9% of the cohort experienced any mental illness.
  • 11.7% of the cohort experienced serious mental illness.
  • 47,330 individuals with intellectual disabilities participated in the study.
  • The study used data from 2004 to 2018.
  • The cohort included individuals aged 13-80 years.
  • Attention-deficit/hyperactivity disorder was associated with 20.6% of both any mental illness and serious mental illness.

Sources:

  • National Health and Medical Research Council.
  • University of New South Wales Sydney.
  • Australian & New Zealand Journal of Psychiatry.
  • Sage Publications Ltd, 1 Olivers Yard, 55 City Road, London EC1Y 1SP, England.
  • National Centre of Excellence in Intellectual Disability Health, Faculty of Medicine and Health, University of New South Wales Sydney, Sydney, NSW, Australia.