Comparison and trends in outcomes of inborn and outborn infants born before 33 weeks’ gestation
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Objective
To compare clinical care and outcome of preterm infants born in a tertiary neonatal unit with those requiring early postnatal transport to the same unit, and analyze their trends over an 9-year period.
Study Design
A retrospective study of infants born before 33 weeks’ gestation between 2013 and 2021. Inborn (n=913) and outborn (n=133) infants were compared using logistic regression and trend analysis.
Result
Outborn infants more frequently required intubation in delivery room (59.4% vs. 32.3%, p<0.001) and mechanical ventilation (69.2% vs. 44.5 %, p<0.001). They more frequently had severe intraventricular haemorrhage (IVH, 15% vs. 8.1%, p=0.027) and had lower survival rate (88.7% vs. 91.9%, p=0.02). Birth outside a tertiary neonatal unit increased the risk of severe IVH [odds ratio: 2.4 (95% confidence interval: 1.3-4.3)]. Only inborn infants showed decreasing trends in delivery room intubation (annual percentage change, APC: -21.2%, p<0.001) and mechanical ventilation (APC: -8.3%, p=0.001).
Conclusion
Outborn infants continue to require more invasive respiratory support and experience worse outcomes.
