Table 4.

Comparison of prenatal, neonatal, and NEC data of infants born at 31 weeks’ gestation

All infants (n=90)	<31 weeks (n=75)	>31 weeks (n=15)	p-value
Prenatal information
Pregnancy-induced hypertension, n (%)	18 (24%)	7 (46.67%)	0.07
Chorioamnionitis, n (%)	5 (6.67%)	0 (0%)	0.3
Antenatal steroids, n (%)	38 (50.67%)	6/15 (40%)	0.45
Maternal Indomethacin, n (%)	2 (2.67%)	0 (0%)	0.52
Infant Demographics
Birth weight (grams; mean ± SEM)	851.43±29.71	1763.6±72.93	<0.001
Gestational age (weeks; mean ± SEM)	25.98±0.24	33.41±0.36	<0.001
Small for gestational age, n (%)	45 (60%)	7 (46.67%)	0.34
Male gender, n (%)	45 (60%)	11 (73.3%)	0.33
African American ethnicity	68 (90.67%)	12 (80%)	0.23
C-section delivery	42 (56%)	6 (40%)	0.26
Outborn	37 (49.33%)	8 (53.33%)	0.77
Infant medical information prior to NEC
5 min Apgar score 0–5, n (%)	14 (18.67%)	2 (13.33%)	0.62
Start enteral feedings (days, mean ± SEM)	2±0.49	2.1±0.3	0.92
Enteral feedings
Mother’s own/donor milk, n (%)	35 (47%)	9 (60%)	0.34
Infant formula, n (%)	40 (53%)	6 (40%)	0.34
Patent Ductus Arteriosus, n (%)	40 (53.33%)	2 (13.33%)	0.005
Patent Ductus Arteriosus, medically treated, n (%)	15 (37.5%)	0 (0%)	0.39
Patent ductus arteriosus, surgically ligated, n (%)	2 (2.67%)	0 (0%)	0.52
Necrotizing enterocolitis
NEC age onset (days; mean ± SEM)	27.35±3.59	37.6±7	0.023
Length bowel resected (centimeters; mean ± SEM)	27.51±2.74	13.57±1.47	0.034
Pressor support 24h after NEC onset, n (%)	45 (60%)	10 (66.67%)	0.63
Post-operative Ileus (days; mean ± SEM)	16.75±1.45	17.64±1.83	0.55
Days of PN (days; mean ± SEM)	89.93±5.47	77.64±9.62	0.47
Day of starting feeds (days; mean ± SEM)	16.85±1.42	18.08±1.89	0.55
Day to reach full feeds (days; mean ± SEM)	80.89±5.32	59±4.45	0.2
Antibiotic days (days; mean ± SEM)	8.28±0.93	5.96±0.9	0.013
Mortality, n (%)	34 (37.8%)	4 (26.7%)	0.18
Length of hospital stay (days; mean ± SEM)	143.42±10.12	83.27±9.9	0.014