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Newborn screening in South Australia: is it universal?
Michael P Metz1, Enzo Ranieri, Rosemarie L Gerace
1Department of Clinical Chemistry, Institute of Medical and Veterinary Science, Frome Road, Adelaide, SA 5000. michael.metz@imvs.sa.gov.au
The Medical Journal of Australia
|October 16, 2003
Summary
In South Australia, 2.2% of newborns missed biochemical screening in 1999. High-risk groups, including those born at home or prematurely, had higher rates, potentially delaying diagnosis of treatable disorders.
Area of Science:
- Public Health
- Neonatal Care
- Biochemical Screening
Background:
- Newborn biochemical screening is crucial for early detection of treatable genetic and metabolic disorders.
- Understanding screening rates and identifying at-risk populations is essential for optimizing public health interventions.
Purpose of the Study:
- To determine the biochemical screening rate for newborns in South Australia in 1999.
- To identify sociodemographic and clinical factors associated with missed newborn screening.
Main Methods:
- Data from the SA Newborn Screening Centre and SA perinatal records were matched for 18,426 live births in 1999.
- Multivariable logistic regression analysis identified risk factors for missed screening.
Main Results:
- The overall newborn biochemical screening rate was 97.8%, with 2.2% of infants missed.
- Higher risks of missed screening were observed for home births, Aboriginal mothers, interstate residents, preterm infants (<32 weeks), and those with congenital abnormalities or neonatal deaths.
Conclusions:
- While the overall screening rate is high, specific high-risk groups experience significantly higher rates of missed screening.
- A 2% missed screening rate suggests a potential delay in diagnosing one newborn with a detectable disorder every two years in South Australia.