Table 1.

Demographics of the participants.

Characteristics	n	%
Sex
Male	2075	49.3
Female	2137	50.7
Race
African American	609	14.5
American Indian	31	0.7
Asian or Pacific Islander	190	4.5
Other	93	2.2
White	3289	78.1
Hispanic Origin
Hispanic	736	17.5
Non-Hispanic	3746	82.5
Geographic Region
Northeast	716	17
Midwest	1060	25.2
South	1340	31.8
West	1096	26
Parent’s Education Level
Less than high school	450	10.7
High school graduate	1387	32.9
More than high school	2375	56.4