Association of congenital heart defects with season and population density

Area of Science:

• Pediatric Cardiology
• Environmental Epidemiology
• Public Health

Background:

• Congenital heart defects (CHDs) are common birth anomalies with multifactorial etiologies.
• Environmental factors, such as seasonality and population density, are increasingly investigated for their potential role in CHD development.

Purpose of the Study:

• To investigate potential associations between the time of year and population density with the incidence of specific congenital heart defects in New England infants.
• To identify environmental risk factors that may contribute to the development of CHDs.

Main Methods:

• Retrospective analysis of infant birth data in New England.
• Statistical examination of correlations between birth dates (seasonality) and population density with specific CHD diagnoses.

Main Results:

• Moderate seasonal peaks in births were observed for complex ventricular septal defect, malposition defects, and transposition of the great arteries.
• Positive associations between higher population density and specific CHDs, including pulmonary atresia with ventricular septal defect, ventricular septal defect with secondary anomalies, and tricuspid atresia, were identified.

Conclusions:

• Certain congenital heart defects exhibit seasonal birth patterns.
• Increased population density may be associated with a higher risk for specific types of CHDs, suggesting potential environmental influences.