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Caesarean section rates, Australia 1986: variations at state and small area level
1Australian Institute of Health, Canberra.
The Australian & New Zealand Journal of Obstetrics & Gynaecology
|November 1, 1991
Summary
This study analyzed the first national Caesarean section rates in Australia using 1986 data. Rates varied significantly, with higher Caesarean section prevalence in urban centers and certain states, suggesting supply and demand influences.
Area of Science:
- Public Health
- Health Services Research
- Epidemiology
Background:
- The first national study of Caesarean section rates in Australia was conducted.
- Data from 1986 hospital morbidity collections and Medicare claims were utilized.
Purpose of the Study:
- To determine national Caesarean section rates.
- To identify variations in rates across different geographical areas and demographic groups.
Main Methods:
- Rates per 100 births were calculated based on the mother's usual residence.
- Data were aggregated from statistical local areas to larger administrative regions (subdivisions, divisions, and states).
Main Results:
- The overall Caesarean section rate for mainland Australia was 16.9%.
- Significant variations (one and a half- to two-fold) were observed, with the highest rates in Canberra (26.3%) and central Brisbane (25.4%).
- Northern Territory, South Australia, and Queensland exhibited higher rates than other states, with generally higher rates in state capital cities and for insured women.
Conclusions:
- Caesarean section rates showed considerable geographical and demographic variation.
- Higher rates in urban areas and for insured women suggest associations with obstetrician supply and demand-side factors, including consumer and provider expectations.