Table 1. Demographic and Substance Use Data (mean±SD).
| Controls (n=24) | Users (n=22) | P | |
|---|---|---|---|
| Age (years) | 21.6 (3.0) | 21.1 (2.6) | 0.59 |
| Education (years) | 15.0 (1.6) | 14.4 (1.4) | 0.20 |
| Gender (no. of females)a | 12 | 7 | 0.21 |
| WAIS (piccom) Scores | 12.9 (2.92) | 12.3 (2.42) | 0.43 |
| WAIS (digit) scores | 11.7 (2.53) | 11.4 (2.40) | 0.68 |
| WAIS (sim) scores | 12.4 (2.57) | 12.5 (2.41) | 0.91 |
| WAIS (dspan) scores | 10.8 (2.44) | 11.7 (3.03) | 0.28 |
| Average number of alcoholic drinks/week | 0.96 (2.5) | 5.3 (4.5) | 0.001a |
| Age of first cannabis use | — | 15.3 (1.4) | — |
| Frequency of cannabis use (joints in last month) | — | 54.0 (36.6) | — |
| Hours since last cannabis use (h) | — | 41.4 (34.0) | — |
Note: WAIS version was the WAIS-III. Subscales included were picture completion (piccom); digit symbol (digit); similarities (sim); digit span (dspan).
a
Results of χ2 test.