| Lot/Variable | Frosinone (N = 509) | Timis (N = 526) | ||||
| Mean | SD | Median | Mean | SD | Median | |
| Alcohol | 3.352 | 0.7859 | 3.000 | 3.406 | 0.8956 | 4.000 |
| Tobacco | 1.419 | 0.5362 | 1.000 | 1.569 | 0.6039 | 2.000 |
| Marijuana | 1.6154 | 0.49614 | 2.0000 | 1.1835 | 0.38744 | 1.0000 |