Is Neonatal Hyperbilirubinemia Exposure Associated with a Risk of Autism Spectrum Disorder? A Nationwide Cohort Study

Area of Science:

• Neonatal care
• Developmental pediatrics
• Public health

Background:

• Neonatal hyperbilirubinemia is a common condition in newborns.
• Autism spectrum disorder (ASD) is a complex neurodevelopmental condition.
• The potential association between neonatal hyperbilirubinemia and ASD risk requires investigation.

Purpose of the Study:

• To investigate the association between neonatal hyperbilirubinemia and the risk of developing autism spectrum disorder (ASD).
• To explore potential risk factors for ASD in a large population-based cohort.

Main Methods:

• Retrospective cohort study using Taiwanese National Health Insurance Research Database (2000-2012).
• Inclusion of neonates born between 2000-2004, with and without hyperbilirubinemia.
• Multivariate Cox's regression analysis to estimate hazard ratios (HRs) for ASD diagnosis by end of 2012.

Main Results:

• A total of 67,017 neonates were analyzed.
• Neonates with hyperbilirubinemia had a 1.28-fold increased risk of ASD (HR=1.28, 95% CI: 1.05-1.57).
• No association was found between hyperbilirubinemia treatments (phototherapy, exchange transfusion) and ASD, indicating no dose-response effect. Boys, preterm birth, and low birth weight were associated with higher ASD risk.

Conclusions:

• While neonatal hyperbilirubinemia showed a slight increased risk for ASD, no dose-response effect was observed.
• The study does not support a causal link between neonatal hyperbilirubinemia and ASD risk due to potential residual confounding.
• Further research is needed to clarify the complex relationship between perinatal factors and ASD development.