Demographics
Values are means (±S.E.M.) for continuous measures, except where otherwise indicated.
| Variable | Total (n = 8) |
|---|---|
| Age (years) | 40.3 (±2.3) |
| Sex (male) | 8 |
| Race (white) | 5 |
| Education (years) | 12.4 (±0.4) |
| Opioid use | |
| Years since first opioid use | 15.8 (±2.3) |
| Days of opioid use in last 30 days | 12.8 (±2.7) |
| Intravenous users | 4 |
| Lifetime use (years) | 4.9 (±1.3) |
| Cocaine use | |
| Years since first cocaine use | 17.5 (±4.3) |
| Days of cocaine use in last 30 days | 8 (±1.8) |
| Intravenous users | 0 |
| Lifetime use (years) | 6.8 (±2.1) |
| Other drugs used in last 30 daysa | |
| Alcohol | 7 |
| Cannabis | 2 |
| Benzodiazepines | 2 |
↵a Number of volunteers that used each drug.