Table 1.

Participant Characteristics and Substance Use. N=181

Variable	Baseline Mean (SD) or %	3-Month Follow- up Mean (SD) or %	t (df)
Age in years	17.11 (1.10)
Education (years)	9.22 (1.26)
CES-D	20.96 (10.28)
Race –white	32.8%
Race – black	28.0%
Race – Native American	3.7%
Race – Asian American	3.2%
Race – other	3.2%
Hispanic	29.1%
Male	85.7%
% drinking days	18.62 (23.64)	8.48 (14.58)	4.23 (161)*
% heavy drinking days	13.91 (22.49)	6.49 (13.84)	5.22 (161)*
% marijuana use days	69.32 (37.76)	39.93 (41.02)	8.89 (161)*

CES-D = Center for Epidemiological Studies – Depression Scale

Baseline N=181

3-Month substance use N=162

^*p ≤ .001