TABLE 1.

Comparison of the sample at baseline (N = 412) according to attrition or retention status at ages 19 and 22.

	Age 19		Age 22
	Retained (N = 297) Mean (SD)	Attrited (N = 115) Mean (SD)	Retained (N = 256) Mean (SD)	Attrited (N = 156) Mean (SD)
Age	11.44 (.93)	11.37 (.93)	11.43 (.92)	11.43 (.96)
Family SES	41.94 (14.27)	37.90 (14.74)	42.62 (14.31)	37.76 (14.18)
Full Scale IQ*	109.14 (15.87)	103.50 (15.62)	113.70 (14.32)	107.02 (15.10)
Grades in school	4.55 (1.07)	4.5 (1.13)	4.6 (1.15)	4.5 (1.02)
TLI (z-score)	.23 (.97)	.28 (1.03)	.20 (.97)	.31 (1.01)
	%	%	%	%
African-American	24.4	23.9	23.8	25.3
European-American	75.6	76.2	76.2	74.7
Paternal SUD	50.3	52.8	38.4	41.9
Maternal SUD	25.4	21.1	23.1	17.1

^*p < .05.