Standardisation of perinatal mortality rates

Area of Science:

• Perinatal health
• Neonatal outcomes
• Ethnic disparities in healthcare

Background:

• Analysis of birth weights and perinatal deaths in the Peninsula Maternal and Neonatal Service from 1974-1987.
• Observed differences in birth-weight distribution among ethnic groups and over time.
• These variations impacted crude perinatal mortality rates.

Purpose of the Study:

• To analyze trends in birth weights and perinatal mortality.
• To investigate ethnic differences in perinatal outcomes.
• To assess the impact of birth weight adjustment on mortality rates.

Main Methods:

• Retrospective analysis of birth weight and perinatal death data.
• Comparison of mortality rates across different ethnic groups (White, Coloured, Black).
• Adjustment for birth weight to standardize mortality rates.

Main Results:

• Ethnic groups exhibited distinct birth-weight distributions.
• Crude perinatal mortality rates were influenced by birth weight variations.
• After adjusting for birth weight, a downward trend in perinatal mortality was observed for all groups.
• Black infants demonstrated significantly higher standardized perinatal mortality rates compared to White and Coloured infants.
• No significant difference in standardized rates was found between Coloured and White infants.

Conclusions:

• Improved perinatal mortality rates are attributable to enhanced survival within each ethnic group.
• Ethnic disparities in perinatal mortality persist, particularly for Black infants, even after accounting for birth weight.
• Targeted interventions may be necessary to address higher mortality rates in specific ethnic populations.