Table 1.

Sample Characteristics [n (%) or M (SD)] (N=1117)

Demographics
Male	514 (46.0%)
White	823 (73.7%)
Parents with college degree	902 (86.2%)
College engagement
Living-learning program	605 (54.3%)
Number of extracurricular activities	2.5 (2.1)
Fraternity/sorority involvement	291 (27.9%)
Baseline substance use
Marijuana use frequency (days, past month)	2.4 (5.7)
Alcohol use frequency (days, past month)	6.3 (5.6)
Typical number of drinks/day	4.5 (2.9)
Number of other illicit drugs used (past year)	0.5 (1.1)
College academic behaviors
Percent of classes skipped (Year 1)	9.8 (12.7)
Baseline psychological risk factors
Behavioral dysregulation	27.9 (11.8)
Anxiety symptoms	7.5 (7.0)
Depressive symptoms	5.2 (4.9)
ADHD diagnosis (self-reported)	63 (5.6%)
Impulsive sensation-seeking	3.5 (2.2)
College academic outcomes
First semester GPA (x 10)	31.5 (6.4)
Cumulative GPA (x 10) at graduation	33.1 (4.3)
Time to graduation
Less than 4 years	71 (6.4%)
4 years	740 (66.2%)
5 years	248 (22.2%)
More than 5 years	58 (5.2%)
School of graduation
Home university	1067 (95.5%)
Another institution	50 (4.5%)

Note. GPA data were rescaled by a factor of 10 to facilitate interpretation of model estimates.