Risk factors for perinatal mortality in Canada

Area of Science:

• Public Health
• Epidemiology
• Perinatology

Background:

• Infant mortality remains a significant public health concern.
• Understanding factors influencing perinatal mortality is crucial for targeted interventions.

Purpose of the Study:

• To analyze perinatal mortality in relation to maternal and infant characteristics.
• To identify key risk factors for early-neonatal mortality.

Main Methods:

• Population-based computer record-linkage study of infant births and deaths (1978-1979).
• Analysis included eight Canadian provinces, excluding Quebec and Newfoundland.
• Logistic regression model used to assess risk factors.

Main Results:

• Perinatal mortality rates were significantly higher in nonurban compared to urban areas.
• Low birth weight (<2500g) or preterm gestation (<35 weeks) showed odds ratios over 8 for early-neonatal mortality.
• Approximately 75% of early-neonatal mortality was linked to low birth weight or fetal immaturity.

Conclusions:

• Low birth weight and fetal immaturity are major contributors to early-neonatal mortality.
• Prevention of low birth weight should be prioritized.
• Geographic disparities in perinatal mortality exist, with higher rates in nonurban settings.