The relationship between congenital malformations and preterm birth

Area of Science:

• Reproductive Medicine
• Pediatric Health
• Public Health

Background:

• Preterm birth is a major global health concern.
• Congenital malformations are birth defects affecting various organ systems.
• Understanding the relationship between these conditions is crucial for improving infant outcomes.

Purpose of the Study:

• To investigate the association between congenital malformations (CM) and preterm (PT) births.
• To quantify the increased risk of PT birth in infants with CM.
• To explore the impact of multiple CM on prematurity.

Main Methods:

• Population-based cohort study using data from the New York State Congenital Malformations Registry (2000-2003).
• Analysis of live births in the Lower Hudson Valley Region, identifying CM using ICD9 codes.
• Poisson regression analysis to determine risk ratios for PT birth in infants with CM, categorized by gestational age.

Main Results:

• Infants with CM had a significantly higher likelihood of PT birth (RR: 2.20).
• Increased risk observed for moderate (RR: 1.95) and very PT births (RR: 3.45).
• The association persisted across most organ systems and malformation types; multiple CM further increased PT risk (OR: 1.72).

Conclusions:

• Congenital malformations are a significant risk factor for preterm birth.
• CM contribute substantially to the degree of prematurity.
• These findings highlight the importance of considering CM in strategies to reduce PT birth rates.