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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: Drug Alcohol Depend. 2011 Feb 5;117(1):38–44. doi: 10.1016/j.drugalcdep.2011.01.003

Table 1.

Drug use characteristics of study participants.

Ever Used? Used Past 30
Days?		 Frequency Past
30 Days‡
Alcohol 19/20 14/20 2 (2) drinks/week
Cannabis 20/20 20/20 4 (3) times/day
Cocaine 8/20 3/20 1 time
Hallucinogens 7/20 1/20 1 time
MDMA 3/20 1/20 1 time
Nicotine/Tobacco* 20/20 16/20 9 (6) times/day
Opioids 6/20 0/20 --
Hypnotics/Tranquilizers 6/20 0/20 --
*

2 participants smoked cigars rather than cigarettes. Tobacco use was not restricted during the study.

‡

Mean (SD) among those who used in the prior month