Table 1.

Subjects maternal, perinatal and neonatal characteristics comparison

		Mg7D (N = 210)	No-Mg7D (N = 92)	P Value
Maternal Characteristics
Age, years		28.1 ± 6.4	27.5 ± 6.5	0.43
Body mass index, kg/m2		31.3 ± 6.6	29.9 ± 7.8	0.14
Race				0.58
	White	40 (19)	14 (15.2)
	Black	28 (13.3)	16 (17.4)
	Hispanic	112 (53.3)	52 (56.5)
	Other	30 (14.2)	10 (10.9)
Illicit drug abuse		21 (10)	10 (10.9)	0.82
Maternal hypertension		62 (29.5)	13 (14.1)	0.004
Perinatal Characteristics
Prolonged rupture of membranes		54 (25.7)	24 (26.1)	0.95
Cesarean delivery		146 (69.5)	67 (72.8)	0.56
Antenatal steroids		200 (95.2)	59 (64.1)	< 0.0001
Antenatal indomethacin		43 (20.5)	8 (8.7)	0.012
Multiple gestations		31 (14.8)	20 (21.7)	0.14
Neonatal Characteristics
Gestational age, weeks		26.2 ± 1.9	26.1 ± 2.1	0.6
Birth weight, g		804 ± 212	812 ± 231	0.8
Male sex		101 (48.1)	48 (52.2)	0.5
5-minutes Apgar score*		7(6–8)	7(5–8)	0.078
Small for gestational age		36 (17.1)	14 (15.2)	0.68
Postnatal steroids		79 (37.6)	37 (40.2)	0.67
Postnatal NSAIDs treatment for PDA		73 (34.76)	40 (43.48)	0.15
First serum magnesium level within 72h, mg/dl		2.7 ± 0.9	2.1 ± 0.4	< 0.0001
Intraventricular hemorrhage grade III or higher		19 (9)	11 (12)	0.4
Late onset sepsis		42 (20)	27 (29.3)	0.075

NSAIDs - non-steroidal anti-inflammatory drugs; PDA - patent ductus arteriosus.

Data are means ± SD. Data are number of neonates with a presenting variable, and values in parentheses are percent of each group.

^*Data are medians and IQR