Table 1.

Sample demographics, diagnosis and use patterns (N=424)

Sex
Male	49.5%
Female	50.5%
Age
Mean	15.88 (SD = 1.25)
Range	12.00–18.00
Ethnicity
Caucasian	74.5%
Hispanic-American	14.5%
African-American	5.0%
Other	5.8%
Socioeconomic Status
Hollingshead Index Mean	34.23 (SD = 14.94) – Middle class
Diagnosis
SUD-only	24.5%
SUD +1	47.9%
SUD/Both	27.6%
Substance use characteristics
Substance using episodes/month	42.99 (SD = 29.12)
Substance-related problems	1.65 (SD = 1.68)
DSM-IV Dependence Symptoms	5.93 (SD = 2.33)

Note: Diagnosis was determined by DISC interviews and the Conduct Disorder Questionnaire.