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. 2014 Dec 29;9(12):e115645. doi: 10.1371/journal.pone.0115645

Table 2. Past Year Quantity of Drug Use (in Standard Units) According to Group and Gender.

Ecstasy Users (N = 48) MJ Users (N = 17)
Males (N = 26) Females (N = 22) Males (N = 8) Females (N = 9) Kruskal-Wallis
Drugs M (N) SD Range M (N) SD Range M (N) SD Range M (N) SD Range p
Ecstasy 17 (26) 21 1–89 12 (22) 24 1–116 0 0 0 0 0 0 .00 a
Alcohol 564 (25) 534 20–1836 244 (20) 204 14–662 296 (8) 297 2–906 356 (9) 537 8–1254 .13
Marijuana 603 (24) 910 1–3650 386 (20) 739 1–3185 306 (8) 189 7–608 256 (9) 262 5–728 .50
Opioids* 29 (7) 60 1–164 4 (3) 1 3–5 0 0 0 0 0 0 .12
Cocaine 21 (13) 31 1–110 2 (11) 3 1–8 54 (2) 70 4–103 0 0 0 .05 c
Methamph. 5 (4) 9 1–18 10 (8) 23 1–67 0 0 0 0 0 0 .03 b
Sedatives 21 (15) 43 2–150 14 (10) 17 1–51 0 0 0 2 (1) 0 2 .01 a
LSD/PCP 5 (7) 6 1–18 2 (7) 2 1–5 0 0 0 0 0 0 .10
Mushrooms 10 (16) 22 1–91 3 (8) 4 1–12 0 0 0 0 0 0 .00 a
Inhalants 15 (16) 30 1–104 10 (5) 5 5–18 0 0 0 0 0 0 .15

Mean quantities were calculated only for participants who reported using the specific drug at least one time in the past year.

*Includes heroin and opioids.

Includes GHB, ketamine, barbiturates, ‘downers,’ Valium, Xanax, and Ativan. Methamph  =  methamphetamine. a =  Ecstasy users > MJ users, b =  Ecstasy females > all other groups, c =  Ecstasy users > MJ females.