A cross-sectional study of brownfields and birth defects

Area of Science:

• Environmental Health
• Reproductive Epidemiology
• Toxicology

Background:

• Brownfields, abandoned or underutilized sites, can contain hazardous waste and contribute to urban blight.
• Neonates and pregnant individuals are particularly vulnerable to environmental exposures.
• The potential link between residential brownfield proximity and adverse birth outcomes requires investigation.

Purpose of the Study:

• To evaluate the association between residential brownfield exposure and the occurrence of birth defects.
• To identify specific types of birth defects that may be linked to brownfield sites.
• To explore potential exposure-response relationships.

Main Methods:

• Utilized North Carolina birth records (2003-2015) for 753,195 births, identifying 39,495 defects.
• Quantified brownfield sites within 2,000 meters of residential addresses at birth.
• Employed multivariable logistic regression, adjusting for demographic and environmental factors.

Main Results:

• Positive associations observed between brownfield exposure and cardiovascular (OR 1.07) and external defect groups (OR 1.17).
• Specific defects like atrial septal (OR 1.08) and ventricular septal defects (OR 1.15) showed increased odds.
• An exposure-response relationship was indicated for several defects across varying levels of brownfield proximity.

Conclusions:

• Residential proximity to brownfields is associated with an increased risk of birth defects, notably cardiovascular and external types.
• Further research focusing on individual defects and specific contaminants is warranted.
• These findings highlight the importance of environmental exposures in reproductive health outcomes.