Users in treatment | Canabis | Cocaine | Amph. | Heroin |
Mean age first use | 17 | 23 | 21 | 24 |
Mean age first treatment | 25 | 34 | 30 | 25 |
% of users in first entrance treatment | 68% | 48% | 60% | 19% |
% previously treated | 32% | 52% | 40% | 82% |