Table 1.
Demographic and substance use characteristics of participants
| Placebo | 1000 mg Acetaminophen |
2 mg Hydromorphone |
4 mg Hydromorphone |
|
|---|---|---|---|---|
| N (M/F) | 13 (8/5) | 13 (7/6) | 12 (8/4) | 12 (8/4) |
| Race (%) | ||||
| Caucasian | 54 | 46 | 58 | 67 |
| African American | 15 | 46 | 0 | 8 |
| Asian | 23 | 8 | 17 | 0 |
| Other | 8 | 0 | 25 | 25 |
| Age (years) | 23.1 ± 4.4 | 23.6 ± 6.6 | 19.9 ± 1.8 | 21.2 ± 2.8 |
| BMI (kg/m2) | 22.6 ± 2.0 | 22.8 ± 2.4 | 21.9 ± 1.6 | 23.2 ± 1.5 |
| Education (years) | 14.9 ± 1.3 | 15.2 ± 2.7 | 14.0 ± 1.2 | 15.7 ± 2.6 |
| Current Drug Use | ||||
| Caffeine (servings/day) | 1.1 ± 1.1 | 1.1 ± 1.0 | 1.4 ± 1.0 | 1.9 ± 1.9 |
| Alcohol (drinks/week) | 5.0 ± 7.6 | 6.9 ± 5.2 | 8.2 ± 7.0 | 6.8 ± 10.3 |
| Recreational Drug Use (% ever used) | ||||
| Stimulants | 23 | 38 | 25 | 8 |
| Tranquilizers | 8 | 0 | 13 | 0 |
| Hallucinogens | 23 | 46 | 31 | 50 |
| Opiates | 0 | 8 | 13 | 0 |
| Marijuana | 62 | 69 | 75 | 92 |
| Other | 8 | 15 | 8 | 8 |
| State Trait Anxiety Inventory | 31.5 ± 6.8 | 31.1 ± 5.5 | 34.5 ± 10.4 | 30.8 ± 7.6 |