Table 1.

Characteristics of Study Sample (N = 3,328), National Longitudinal Study of Adolescent Health

	Mean or Percent	Standard Deviation
Birth weight (grams, range = 992 – 5,330)	3282.50	569.17
Prenatal Smoking	21.66%
Family-of-origin socioeconomic status
Level of parent’s education (range = 0 – 9)	5.02	2.15
(Log) Parental income (range = 0 – 6.8)	3.40	.82
Living with two biological parents	49.69%
Current smoker, Wave I	33.50%
Grade point average, Wave I (range = 1 – 4)	2.79	.74
Depressive symptomology, Wave I (range = 0 – 2.9)	.78	.54
Binge drinking, Wave I (range = 0 – 6)	.78	1.14
Race-Ethnicity
non-Hispanic White (reference)	72.31%
non-Hispanic Black	16.86%
Hispanic	10.83%
Foreign-born	2.76%
Unmarried at birth	58.70%
Teen birth (1 = 19 or less, 0 = 20+)	32.42%
Infant is male	51.80%

Notes: Statistics are weighted and adjusted for clustering.