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Intellectual disability in Western Australia.

C Bower1, H Leonard, B Petterson

  • 1Division of Epidemiology, TVW Telethon Institute for Child Health Research, West Perth, Disability Services Commission, West Perth, Western Australia, Australia. carolb@ichr.uwa.edu.au

Journal of Paediatrics and Child Health
|June 10, 2000
PubMed
Summary

Intellectual disability prevalence in Western Australia was 8.3 per 1000 births. Newborn screening has prevented intellectual disability from phenylketonuria and congenital hypothyroidism.

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Area of Science:

  • Public Health
  • Epidemiology
  • Developmental Pediatrics

Background:

  • Intellectual disability (ID) presents a significant public health challenge.
  • Understanding prevalence, causes, and trends is crucial for effective intervention.
  • Western Australia (WA) provides a unique setting for epidemiological studies.

Purpose of the Study:

  • To determine the prevalence of intellectual disability in Western Australia.
  • To identify the causes and trends of intellectual disability over time.
  • To evaluate the impact of preventative measures on intellectual disability rates.

Main Methods:

  • Utilized an administrative database for intellectual disability in WA.
  • Analyzed childhood intellectual disability trends.

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  • Examined data from birth cohorts spanning 1980-1992.

    • Main Results:

    • Prevalence of intellectual disability was 8.3 per 1000 live births (1980-90).
    • No known cause identified in 50% of cases; Down syndrome accounted for 14-15%.
    • Newborn screening eliminated intellectual disability due to phenylketonuria and congenital hypothyroidism; autism spectrum disorder rates increased.

    Conclusions:

    • Newborn screening is effective in preventing specific causes of intellectual disability.
    • Further research is needed to understand risk factors.
    • Linking administrative data with maternal and child health data offers opportunities for detailed investigation.