Table 2.

Substance Use Parameters by Group

	NU (n = 65)	CU (n = 65)
Current (30 day) DSM-IV SUD
Alcohol Abuse	3%	8%
Cannabis Abuse**	0	32%
Cannabis Dependence**	0	29%
Lifetime DSM-IV SUD
Alcohol Abuse*	8%	23%
Alcohol Dependence	2%	2%
Cannabis Abuse**	0	42%
Cannabis Dependence**	0	34%
Cannabis Use Parameters
DSM-IV CUD Symptoms (Md, IQR)	-	1 [0, 3]
Marijuana Severity Index	-	10.0 (4.3)
Age at cannabis use onset	-	15.6 (3.1)
Years of cannabis use	-	5.0 (2.4)
% THC+**	0	77%
Days since last use (Md, IQR)
Alcohol**	14 [4, 30], n = 60	6 [3.5, 14], n = 65
Nicotine**	14 [4, 450], n = 23	2 [1, 8.75], n = 54
Cannabis**	720 [365, 1278], n = 17	3 [2, 4.5], n = 65
Lifetime (Md, IQR)
Alcoholic drinks**	108 [13, 498]	492 [163, 1254]
Cigarette Packs**	0 [0, 0.1]	68.4 [1.1, 291]
Cannabis joints**	0 [0, 0]	270 [102, 815]
12 months (Md, IQR)
Alcoholic drinks**	24 [4, 120]	108 [34, 258]
Cigarettes**	0 [0, 0]	3 [0, 36]
Cannabis joints**	0 [0, 0]	60 [26, 216]
30 days (Md, IQR)
Alcohol drinks*	4 [0, 14]	10 [2, 20]
Cigarettes**	0 [0, 0]	0.35 [0, 3]
Cannabis joints**	0 [0, 0]	6 [3, 18]

^*p<.05,

^**p<.01

Note: All values are means and standard deviations unless otherwise noted; NU, non-users; CU, cannabis users; DSM-IV SUD, Diagnostic and Statistical Manual IV Substance Use Disorder diagnosis; CUD, Cannabis Use Disorder; THC+, positive rapid urine toxicology testing for cannabis; Md, Median; IQR, interquartile range; -, not applicable