Table 2.

Mean (SE) age, education, drinking habits, and drug use by group

Variable	PLA	ENC	CON
Age, in years	24.3 (0.5)	24.4 (0.6)	23.6 (0.5)
Education, years	15.5 (0.3)	15.5 (0.3)	15.2 (0.2)
TLFB, past 30 days
Total drinking days	16.9 (1.3)	15.3 (1.2)	18.1 (1.4)
Total drinks	57.4 (5.0)	57.9 (7.0)	65.0 (7.0)
Total heavy drinking episodes	4.8 (0.5)	5.5 (0.8)	6.8 (0.9)
Caffeine, cups/day	2.2 (0.4)	1.7 (0.1)	2.0 (0.3)
Nicotine, cigarettes/week	1.1 (0.6)	1.0 (0.4)	2.2 (0.6)
Cannabis, times/month	12.4 (7.0)	7.4 (2.8)	11.7 (3.3)

Notes: Mean cigarettes/week based on n = 8 (PLA), n = 5 (ENC), and n = 7 (CON); mean cannabis times/month based on n = 8 (PLA), n =12 (ENC), and n = 10 (CON). PLA = placebo condition; ENC = encoding condition; CON = consolidation condition; TLFB = Timeline Followback.