. Author manuscript; available in PMC: 2016 May 1.

Published in final edited form as: J Pediatr. 2015 Feb 11;166(5):1181–1186. doi: 10.1016/j.jpeds.2015.01.003

Table 1.

Demographics

	Race
	Black N=42	White N=24
	N (%) or mean (SD)	N (%) or mean (SD)	p-value
Sex of Infant
Male	23 (55)	12 (50)	0.09
Female	19 (45)	12 (50)	0.28
Maternal Education			<0.01^*
Less than high school	7 (17)	3 (13)
High school graduate or GED	13 (31)	3 (13)
Some college or vocational training	17 (40)	5 (21)
College or professional degree	4 (10)	13 (54)
Maternal age at conception (years)	26.3 (4.4)	28.5( 6.1)	0.09
Paternal age at conception (years)	30.8 (7.1)	30.8 (5.89)	1.00
Birth weight (grams)	3143 (436)	3443 (438)	0.01^*
Gestational age (weeks)	38.8 (1.3)	39.1 (1.4)	0.40

Note.

P-value based on Likelihood Ratio Chi-square or t-test where appropriate