Table 1.

Demographics of control and marijuana participants.

	Controls (n = 34)	Marijuana users (n = 36)	p values
Demographics
Gender (% male)	39%	64%	0.10
Age	21.6 (2.1)	20.8 (2.2)	0.11
Education (years)	15.4 (1.9)	14.2 (1.7)	0.01*
WTAR	119.7 (5.2)	118.4 (9.1)	0.50
Impulsivity (BIS)
Attentional	15.6 (4.0)	16.7 (3.7)	0.26
Motor	20.3 (3.5)	22.3 (3.6)	0.02*
Nonplanning	20.6 (4.0)	23.4 (4.1)	0.01*
Substance Use
Alcohol Use (Drinks/week)	2.3 (1.9)	2.9 (2.4)	0.34
Marijuana Use (Joints/week)	N/A	5.5 (4.8)	N/A
Days since last marijuana use	N/A	3.1 (3.9)	N/A
Age of Onset of marijuana use (years)	N/A	16.6 (1.6)	N/A
Number with marijuana abuse/dependence	N/A	14 (39%)	N/A

^*Significant difference between groups. BIS scores reported are raw scores.