Table 1.
Group differences (ANOVA) in demographic data and cognitive ability.
| Measures | NUC (n = 20) | RUC (n = 20) | PUD (n = 19) | F(2, 56) | eta2 | Post-hoc | |||
|---|---|---|---|---|---|---|---|---|---|
| M | SD | M | SD | M | SD | ||||
| Age | 23.95 | 1.91 | 26.00 | 2.85 | 25.84 | 4.03 | 2.80 | 0.09 | – |
| Education (years) | 13.50 | 2.67 | 14.10 | 2.94 | 12.47 | 2.70 | 1.71 | 0.06 | – |
| Education (status)a | 1.00 | 0.07 | 1.00 | 0.07 | 0.65 | 0.07 | 15.82** | 0.40 | NUC, RUC > PUD |
| Nicotine consumptionb | 0.00 | 0.00 | 3.00 | 1.49 | 3.42 | 1.31 | 53.02** | 0.65 | NUC < RUC, PUD |
| WPT | 28.00 | 6.84 | 29.75 | 6.44 | 18.89 | 7.42 | 13.79** | 0.33 | NUC, RUC > PUD |
**
p < 0.01, NUC, Non-using controls, RUC, Recreational using controls, PUD, Poly-drug use disordered patients, WPT, Wonderlic Personnel Test.
a
Education status was dummy coded: 0, compulsory education and apprenticeship; 1, qualification for university entrance and university degree.
b
in the last month.