Table 6.

Logistic Regression Model

Variables	NEC	LOS	Death	NSD
Maternal Antibiotics (Y/N)	OR 0.28	OR 1.59	OR 0.29	OR 0.52
	(0.14–0.56)	(0.84–2.99)	(0.14–0.60)	(0.32–0.85)
	P < 0.001	P = 0.15	P = 0.001	P = 0.01
High Infant Antibiotics (Y/N)	OR 1.11	OR 0.99	OR 3.18	OR 1.45
	(0.52–2.39)	(0.53–1.88)	(1.55–6.54)	(0.85–2.45)
	P = 0.79	P = 0.99	P = 0.002	P = 0.17
Gestational Age (Weeks)	OR 0.71	OR 0.66	OR 0.55	OR 0.60
	(0.61–0.83)	(0.58–0.75)	(0.46–0.65)	(0.53–0.67)
	P <0.001	P < 0.001	P < 0.001	P < 0.001
Primiparous (Y/N)	OR 1.58	OR 0.62	OR 1.61	OR 1.17
	(0.79–3.14)	(0.32–1.21)	(0.76–3.42)	(0.69–2.01)
	P = 0.19	P = 0.16	P = 0.22	P = 0.56
>75% Maternal Milk (Y/N)	OR 1.47	OR 0.46	OR 0.24	OR 0.42
	(0.73–2.96)	0.27–0.82)	(0.12–0.50)	(0.26–0.67)
	P = 0.28	P = 0.008	P < 0.001	P < 0.001
Multiple birth (Y/N)	OR 0.21	OR 0.89	OR 0.76	OR 0.68
	(0.07–0.63)	(0.47–1.70)	(0.33–1.75)	(0.39–1.19)
	P = 0.005	P = 0.73	0.52	P = 0.18

^*Controlled for prenatal and postnatal antibiotic exposure, gestational age, sex, race, mode of delivery, high human milk exposure, maternal chorioamnionitis, C-section delivery, premature rupture of membranes, maternal pre-eclampsia, prenatal steroids, parity, multiple birth, and hospital location.