Table 1. Demographic and Clinical Measures.
| Characteristic |
Stimulant-dependent individuals |
Siblings |
Controls |
|||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | |
| Male/female | 30:2 | 17:22 | 26:15 | |||
| Age (years) | 34.53 | 7.81 | 33.00 | 8.56 | 31.68 | 8.49 |
| Verbal IQ (NART) | 110.67 | 7.33 | 109.08 | 8.85 | 112.00 | 8.34 |
| Drug-taking experience (DAST-20) | 0.36 | 0.74 | 0.00 | 0.00 | ||
| Mean number of cigarettes | 17.41 | 14.20 | 5.76 | 8.48 | 0.87 | 3.14 |
| Alcohol use (AUDIT) | 11.41 | 10.79 | 3.23 | 3.57 | 3.05 | 2.25 |
| Compulsivity (OCDUS) | 24.53 | 9.71 | ||||
| Duration of stimulant use (years) | 15.87 | 6.71 | ||||
| Age of stimulant use onset (years) | 16.59 | 3.04 | ||||
Abbreviations: NART, National Adult Reading Test; OCDUS, Stimulant-related Obsessive Compulsive Drug Use Scale; DAST-20, Drug Abuse Screening Test, cut-off score for drug abuse: >5; AUDIT, Alcohol Use Disorders Identification Test, cut-off score for alcohol abuse: >8.