Caesarean section in Christchurch.

Area of Science:

• Obstetrics and Gynecology
• Public Health
• Epidemiology

Background:

• Base hospital caesarean section rates in Christchurch rose from 4.1% in 1967 to 14.1% in 1982.
• The overall Christchurch district caesarean section rate in 1982 was 9.6%.

Purpose of the Study:

• To analyze trends in caesarean section indications over time.
• To compare caesarean section rates and indications based on antenatal booking type and patient status.

Main Methods:

• Retrospective analysis of caesarean section data from 1967 to 1982.
• Categorization of indications for caesarean section.
• Comparison of rates between different patient groups (private, clinic, emergency transfer).

Main Results:

• Most indications for caesarean section increased in frequency between 1977 and 1982.
• Failure to progress and fetal distress showed a highly significant increase in caesarean section frequency.
• Private patients had higher caesarean section rates than clinic patients, especially for failure to progress and fetal distress.
• Emergency transfer patients exhibited even higher primary caesarean section rates for most indications.

Conclusions:

• Rising caesarean section rates are driven by specific indications like failure to progress and fetal distress.
• Antenatal booking type and emergency transfer status are associated with increased caesarean section likelihood.
• Further investigation into the factors influencing these trends is warranted.