Caesarean section in South Australia, 1986.

Area of Science:

• Obstetrics and Gynecology
• Perinatal Epidemiology
• Public Health

Background:

• Caesarean section rates have been a growing concern globally.
• Understanding demographic and clinical factors associated with Caesarean sections is crucial for improving maternal and neonatal outcomes.

Purpose of the Study:

• To profile Caesarean section rates in South Australia in 1986.
• To identify factors associated with elective and emergency Caesarean sections.
• To compare neonatal outcomes between vaginal births and emergency Caesarean sections.

Main Methods:

• Analysis of 19,800 births from the 1986 South Australian perinatal statistics collection.
• Calculation of Caesarean confinement rates, differentiating between elective and emergency procedures.
• Statistical comparison of maternal characteristics and neonatal outcomes based on delivery mode.

Main Results:

• The overall Caesarean section rate was 19.0% (9.0% elective, 9.9% emergency).
• Rates were highest in metropolitan hospitals. Elective sections were more common in private hospitals, older women, and cases with previous perinatal death or malpresentation.
• Emergency sections were more frequent in primigravidas, non-Caucasian women, and those with pregnancy complications. Neonates from emergency sections had higher risks of prematurity, low birth weight, vital sign depression, and mortality.

Conclusions:

• Significant variations exist in Caesarean section rates and indications.
• Emergency Caesarean sections are associated with poorer neonatal outcomes compared to elective sections and vaginal births.
• Targeted interventions may be needed to address specific risk factors and improve perinatal care.