Demographic |
Age, yr | 41.68 ± 7.4 | 42.31 ± 7.6 | 43.20 ± 6.2 | t = −0.67 |
Sex, male/female | 11/8 | — | 13/5 | χ2 = 0.83 |
Education, yr | 12.63 ± 2.9 | — | 13.08 ± 1.4 | t = −0.62 |
Nonverbal IQ‡ | 9.58 ± 3.4 | — | 11.12 ± 2.2 | t = −1.62 |
Depression: Beck Depression Inventory II§ | 7.00 ± 8.1 | 5.40 ± 7.5 | 2.28 ± 4.4 | F = 2.08 |
Drug use |
Cigarette smokers, current/past or nonsmoker§ | 11/8 | — | 3/15 | χ2 = 6.68 |
Daily cigarettes in current smokers | 5.27 ± 3.6 | 6.91 ± 6.4 | 4.67 ± 5.0 | F = −1.24 |
Age at onset of cocaine use, yr | 25.53 ± 9.5 | — | — | — |
Duration of cocaine use, yr | 14.00 ± 7.8 | — | — | — |
Duration of current abstinence, d | 143.88 ± 169.23 | 183.12 ± 136.16 | — | Z = −1.34 |
Frequency of cocaine use (last 30 d), d/wk | 0.53 ± 1.7 | 0.06 ± 0.2 | — | Z = 1.14 |
Cocaine Craving Questionnaire score (0–45) | 7.6 ± 4.8 | 7.0 ± 8.8 | — | Z = 0.27 |