Childhood neurodevelopment after spontaneous versus indicated preterm birth

Area of Science:

• Neonatal Medicine
• Neurodevelopmental Pediatrics
• Obstetrics

Background:

• Preterm birth is a leading cause of infant mortality and morbidity.
• Survivors face increased risks of long-term neurodevelopmental deficits.
• The impact of the cause of preterm birth on neurodevelopment remains understudied.

Purpose of the Study:

• To determine if neurologic outcomes differ between indicated and spontaneous preterm births.
• To assess the association between the type of preterm birth and neurodevelopmental deficits.
• To identify potential risk factors for adverse neurodevelopmental outcomes in preterm infants.

Main Methods:

• Secondary analysis of a multicenter trial involving preterm deliveries between 24-31 weeks gestation.
• Categorization of preterm birth into spontaneous (labor/rupture of membranes) or indicated (iatrogenic).
• Primary outcome: death or abnormal Bayley II scores (2 SD below mean) by age 2.
• Logistic regression used to adjust for confounders.

Main Results:

• Indicated preterm birth (2.8%) was associated with significantly higher rates of death or abnormal Psychomotor Developmental Index scores compared to spontaneous preterm birth (20.9% vs 36.2%, P=.01).
• After adjusting for confounders, indicated preterm birth remained associated with increased probability of death or low Psychomotor Developmental Index scores (P=.02).
• Adjusted analysis controlling for small for gestational age infants showed a significant association between indicated preterm birth and adverse psychomotor outcomes (aOR 1.98).

Conclusions:

• Indicated preterm deliveries are associated with worse psychomotor development outcomes compared to spontaneous preterm deliveries.
• Findings suggest the cause of preterm birth may significantly impact infant neurodevelopment.
• Further research in larger cohorts is recommended to confirm these findings.