Demographic characteristics of ecstasy users
| Subject | Age | Sex | Frequency of use | Duration of use (y) | Phosphene threshold |
|---|---|---|---|---|---|
| Frequency of use refers to the number of tablets per week (see text for details). | |||||
| 1 | 23 | M | 3 | 5 | 40 |
| 2 | 22 | M | 1 | 3 | 72 |
| 3 | 28 | M | 1 | 6 | 90 |
| 4 | 18 | M | 2 | 2 | 75 |
| 5 | 21 | M | 3 | 3 | 65 |
| 6 | 19 | M | 1 | 5 | 70 |
| 7 | 24 | F | 2 | 4 | 62 |
| 8 | 23 | M | 3 | 2 | 35 |
| 9 | 21 | M | 3 | 1 | 60 |
| 10 | 28 | M | 1 | 1 | 70 |