| Polydrug use† |
|
|
|
| Ever used | 45 (87%) | 37 (67%) | 0.02 |
| Recent use | 8 (18%)1 | 3 (8%)2 | 0.20 |
| Composite neuropsychological test z-scores | |||
| Learning and memory | −0.26± 1.033 | 0.09 ± 0.99 | 0.09 |
| Executive function | 0.15 ± 0.99 | 0.21 ± 1.17 | 0.77 |
| Working memory | −0.14 ± 0.78 | 0.29 ± 0.89 | 0.01 |
| Psychomotor speed | 0.28 ± 0.62 | 0.27 ± 0.84 | 0.96 |
| Global | −0.07 ± 0.564 | 0.13 ± 0.62 | 0.11 |
| Beck Depression Inventory (BDI) scores | |||
| Somatic subscore, median (Q1 - Q3) | 4.0 (2.5 - 6.5) | 2.0 (0 - 3.0)5 | <0.000‡ |
| Cognitive-affective subscore, median (Q1 - Q3) | 5.0 (1.5 - 9.0) | 1.0 (0 - 4.0)5 | 0.001‡ |
| Total score, median (Q1 - Q 3) | 10.0 (5.0 - 15.0) | 4.0 (1.0 - 7.0)5 | <0.000‡ |