Table 1.

Demographic Characteristics of Study Participants.

Age (years)	26 ± 4
Sex (M/F)	14/2
Race (B/W)	10/8
Days/Week Marijuana Use	6.6 ± 0.9
Marijuana Cigarettes/Day	10.0 ± 6.5
Cigarette Smokers	10/14*
Cigarettes/Day	5.7 ± 3.7
Weekly Alcohol drinkers	7/14
Days/Week Alcohol Use	2.8 ± 2.2

Note: Data are presented as means (± SD) or as frequency. Sex is indicated as female (F) and male (M) and race is indicated as Black (B) and White (W).

^*One participant began smoking cigarettes under the quetiapine condition while inpatient.