Table 2

Characteristics of infants with birth weights between 501 and 1500 g who were born from 2004 to 2007

	NICORE Ireland	VON
	N = 2888	N = 191422	χ²
	%	%	p Value
Inborn	87.0	84.0	<0.001
Male	50.2	51.0	0.40
Race
Black	3.5	24.2	<0.001
White	91.5	52.2	<0.001
Asian	1.2	4.7	<0.001
Other	3.5	19.7	<0.001
Prenatal care	97	95	<0.001
Antenatal steroids	80.7	74.2	<0.001
Caesarean section	65.2	70	<0.001
Multiple gestation	28.5	28.2	0.74
Congenital malformation	5.7	5.0	0.09
SGA	23.0	20.0	<0.001

NICORE, Neonatal Intensive Care Outcomes Research and Evaluation; SGA, small for gestational age; VON, Vermont Oxford Neonatal Network.