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Clinical characteristics of the subjects
| Placebo | Active | P value | |
|---|---|---|---|
| n | 30 | 30 | |
| Age (years), mean (SD) | 37.5 (7.2) | 37.0 (7.2) | 0.75 |
| Male, n (%) | 19 (63%) | 15 (50%) | 0.43 |
| Caucasian, n (%) | 21 (70%) | 20 (67%) | 1 |
| Smoking as primary route of administration, n (%) | 20 (67%) | 24 (80%) | 0.38 |
| AWQ withdrawal score (0–40), mean (SD) | 14.9 (6.9) | 14.6 (8.0) | 0.72 |
| ADHD diagnosis, n (%) | 4 (13%) | 5 (17%) | 1 |
ADHD, attention deficit hyperactivity disorder; AWQ, Amphetamine Withdrawal Questionnaire.
