Table 1.
Age and drug use variables for commonly used drug classes by MDMA/non-MDMA user status.
| MDMA |
Non-MDMA |
|||||||
|---|---|---|---|---|---|---|---|---|
| Min. | Max. | Mean (S.D.) | Abstinence days mean (S.D.) | Min. | Max. | Mean (S.D.) | Abstinence days mean (S.D.) | |
| Age | 18.0 | 35.0 | 26.0 (5.4) | – | 18.0 | 33.0 | 22.9 (5.4) | – |
| Ecstasy episodes | 8 | 80 | 29.6 (20.1) | 669.4 (664.5) | 0 | 0 | 0 | – |
| Ecstasy milligrams* | 400.0 | 8000.0 | 2365.2 (2018.3) | – | 0 | 0 | 0 | – |
| Alcohol episodes | 12 | 4306 | 845.5 (1149.1) | 22.3 (18.5) | 26.0 | 2143 | 466.6 (651.1) | 23.5 (11.5) |
| Alcohol units* | 24.0 | 12,254.0 | 3353.2 (3909.0) | – | 63.0 | 6243.0 | 1944.0 (2479.2) | – |
| Cannabis episodes | 0 | 2501 | 399.27 (754.4) | 574.5 (1776.3) | 2.0 | 1516 | 202.0 (463.9) | 194.5 (272.5) |
| Cannabis joints* | 0 | 1250 | 229.19 (387.1) | – | 0.5 | 759.0 | 128.6 (233.7) | – |
| Cocaine episodes | 0 | 104 | 26.7 (33.2) | 676.5 (980.1) | 0 | 31 | 3.9 (9.7) | 399.7 (345.0) |
| Cocaine gram | 0 | 100.4 | 15.4 (26.7) | – | 0 | 9.0 | 1.0 (2.8) | – |
| Methamphetamine episodes | 0 | 85 | 10.9 (24.0) | 1655.9 (1364.0) | 0 | 17 | 1.7 (5.4) | 193.0 (N/A) |
| Methamphetamine milligrams | 0 | 2950.0 | 377.3 (862.3) | – | 0 | 610.0 | 61.0 (192.9) | – |
*
The standardized drug values are 50 mg per tablet MDMA; a unit of alcohol is 14 g pure alcohol (12 oz. beer or standard drink equivalent); a joint consists of 10 puffs of cannabis.
**
Days since last dose. All participants used alcohol. All participants except for one MDMA user used cannabis. In the control group; 2 used amphetamines, 1 used methamphetamine, and 3 used cocaine. In the MDMA group; 4 used amphetamines, 7 used methamphetamine and 9 used cocaine.