Objective
Necrotizing enterocolitis (NEC) is associated with significant morbidity and mortality in premature infants. We sought to identify the frequency of NEC in very-low-birth-weight infants with isolated ventricular septal defects (VSD) or atrial septal defects (ASD) using a large multicenter database.
Methods
We identified a cohort of infants with birth weight <1500 g cared for in 312 neonatal intensive care units managed by the Pediatrix Medical Group between 1997 and 2010. We examined the association between presence of an ASD or a VSD with development of NEC using logistic regression to control for small-for-gestational-age status, antenatal steroid use, antenatal antibiotic use, gestational age, sex, race, Apgar score at 5 minutes, and method of delivery.
Results
Of the 98,523 infants who met inclusion criteria, 1,904 (1.9%) had an ASD, 1943 (2.0%) had a VSD, and 146 (0.1%) had both. The incidence of NEC was 6.2% in infants without septal defects, 9.3% in those with an ASD, 7.8% in those with a VSD, and 10.3% in infants with both an ASD and a VSD. Compared to infants without septal defects, the adjusted odds ratios for developing NEC for each group—ASD alone, VSD alone, and ASD with VSD—were 1.26 (95% confidence interval 1.06–1.49), 1.27 (1.08–1.52), and 1.80 (1.03–3.12), respectively.
Conclusion
The presence of an ASD or a VSD was associated with NEC in this cohort of premature infants.