Table 2.

Patient characteristics at enrollment (n=154)

		High Risk	Low risk	p
n		38	116
Age at randomization (days)		24 ± 11	20 ± 9	0.05
Gestational age at birth (weeks)		38.3 ± 1.5	38.4 ± 1.4	0.58
Birth weight (kg)		3.21 ± 0.51	3.28 ± 0.52	0.67
Birth weight for gestational age percentile		45.7 ± 29.1	50.2 ± 29.1	0.37
Male		74%	66%	0.43
Race				0.80
Caucasian		79%	81%
African American		18%	14%
Asian		0%	1%
Other		3%	4%
Hispanic		8%	19%	0.20
Hypoplastic left heart syndrome		61%	58%	0.07
Weight for age z-score		−1.70 ± 1.40	−1.14 ± 1.24	0.02
Height for age z-score		−1.44 ± 1.39	−0.94 ± 1.20	0.03
Head circumference for age z-score		−2.11 ± 1.61	−1.65 ± 1.38	0.09