Table 1.
Demographic and performance characteristics of cannabis use groups.
| Characteristic | Cannabis users (n = 109) | HSD | ||
|---|---|---|---|---|
| Recent use (n =68) (a) |
Past use (n =41) (b) |
Non-users (n =49) (c) |
||
| M (SD)or % | M (SD)or% | M (SD)or % | ||
| Demographics | ||||
| Age | 35.9 (13.9) | 51.2 (10.0) | 34.9 (13.8) | b > a,c |
| Education (years) | 14.3 (1.8) | 14.6 (1.3) | 14.7 (1.6) | NS |
| Gender (% male) | 57% | 23% | 19% | c,b < a |
| Ethnicity | ||||
| African American | 50% | 23% | 60% | b < a,c |
| Caucasian | 50% | 77% | 40% | c < b |
| Alcohol use (last 12 months) | 95% | 100% | 30% | c < a,b |
| Alcohol abuse (current) | 12.5% | 6.7% | 8.7% | NS |
| Alcohol abuse (past) | 26.9% | 12.5% | 20.0% | b < a |
| Alcohol dependence (current) | 0% | 0% | 0% | NS |
| Alcohol dependence (past) | 17.1% | 15.3% | 13.3% | NS |
| Major depressive disorder (current) | 4.9% | 7.6% | 6.7% | NS |
| Major depressive disorder (past) | 26.8% | 42.3% | 26.7% | NS |
| WTAR | 106.1 (14.0) | 115.2 (6.2) | 100.0 (17.7) | c < a,b |
| NP performancea | ||||
| Global | 40.9 (13.9) | 45.6 (6.2) | 44.0 (8.2) | a < b,c |
| Atten/WM | 42.4 (16.1) | 46.1 (8.0) | 50.5 (10.2) | a < b,c |
| Learn/Mem | 38.3 (12.2) | 39.5 (9.0) | 40.1 (14.3) | NS |
| Info process | 44.3 (7.3) | 49.3 (8.2) | 52.1 (11.0) | a < b, c |
| Executive | 43.6 (13.4) | 45.3 (7.3) | 48.6 (7.2) | a,b < c |
Note. NS= nonsignificant; WTAR= Wechsler Test of Adult Reading; HSD = Tukey honest significant difference; NP = neurocognitive performance
a
Values represent T-scores