Table 1.

Participant Characteristics

	Healthy Young Adults (N = 41)
Age	24.8 (4.7)
Sex (% Female)	51%
Ethnicity (% Hispanic)	22%
Race
% Caucasian	65%
% More than 1 Race	15%
% Black	5%
% Asian	15%
BMI	23.9 (2.6)
Current substance use
Alcohol (drinks/week)	1.4 (1.1)
Cannabis (times/month)	4.5 (7.5)
Caffeine (cups/day)	1.1 (1.0)
% Used cigarettes (cigarettes/day)	5% (n= 2, 0.1 ± 0.8)
Lifetime drug use (at least once)
% Used stimulants (# times used)	27% (n= 11, 2.5 ± 3.1)

Note. All values are mean (SD) or percentage