. Author manuscript; available in PMC: 2014 Jan 27.

Published in final edited form as: J Pediatr. 2008 Jun 25;153(4):503–508. doi: 10.1016/j.jpeds.2008.05.004

Table 1.

Demographic Characteristics of Participants

Characteristic	All Groups (N=708)
Maternal age, median (inter-quartile range), y	23 (20, 28)
Infant age, median (inter-quartile range), mo	3 (1, 6)
Infant gender, % female	51
Maternal race, %
Black	66
Hispanic	14
White	15
Other	5
Maternal education, %
Less than high school	21
High school/GED	39
Some college	29
College/more	11
Site, %
Dallas	27
New Haven	26
Atlanta	24
Savannah	23