Table 1.
Baseline characteristics of the experimental and placebo medication groups.
| Medication groups | ||||
|---|---|---|---|---|
| Characteristic | Experimental (n = 56) | Placebo (n = 55) | P-value | |
| Mean age (years) (SD) | 40.77 (7.46) | 35.98 (8.75) | 0.0033 | |
| Gender (%) | Male | 80 | 75 | NS |
| Ethnicity: (%) | White | 65.4 | 55.4 | NS |
| Hispanic (all) | 21.8 | 37.4 | ||
| Black | 9.1 | 5.4 | ||
| Marital status (%) | Married | 20.0 | 21.4 | NS |
| Widowed/divorced/separated | 16.4 | 17.9 | ||
| Never married | 63.6 | 60.7 | ||
| Employment (%) | Full time | 58.2 | 53.6 | NS |
| Part-time | 18.2 | 32.1 | ||
| Unemployed | 20.0 | 10.7 | ||
| Other | 3.6 | 3.6 | ||
| Criminal justice status | On probation/parole (%) | 89.1 | 82.1 | NS |
| Has criminal history (%) | 43.6 | 33.9 | NS | |
| Abuse history | Physically abused (%) | 60.0 | 57.1 | NS |
| Sexually abused (%) | 69.1 | 75.0 | NS | |
| Drug treatment/drug use/craving | Mean no. of treatments | 1.69 (2.76) | 2.02 (5.40) | NS |
| Mean no. of days amphetamine/methamphetamine | ||||
| Use in past 30 days | 17.82 (9.90) | 17.13 (9.45) | NS | |
| Mean years of use | 10.84 (8.18) | 9.66 (6.60) | NS | |
| Mean craving (BSCS) | 6.62 (2.91) | 6.59 (2.93) | NS | |
BSCS: The Brief Symptom Craving Scale; SD: standard deviation; NS: not significant. [Correction added after online publication 7 December 2011; amphetamine/methadone has been changed to amphetamine/methamphetamine].