Table 1.
Socio-demographic information and diagnostic characteristics of the study sample for Experiment 1 (n = 53)
| Characteristic | Mean (SD) or % |
|---|---|
| Drug use | |
| Heroin and cocaine | 84.91% |
| Heroin only | 1.89% |
| Cocaine only | 13.21% |
| Age (years) | 37.11 (10.42) |
| Sex/gender (females) | 21% |
| Education (years)a | 11.21 (3.47) |
| Ethnicity | |
| Caucasian | 88.68% |
| Multiethnic | 7.55% |
| Black/African | 1.89% |
| Indian/Pakistani/Bangladeshi | 1.89% |
| Employment statusa | |
| Employed | 46.34% |
| Retired/disability | 9.76% |
| Controlled environment | 9.76% |
| Unemployed | 34.15% |
| Fixed residence | 86.79% |
| Household | |
| Family/partner | 82.61% |
| Alone | 10.87% |
| Flat mates | 6.52% |
| Methadone programb | 84.91% |
| mg/d | 55.91 (57.24) |
| Heroin | n = 46 |
| Years of use | 15.96 (10.31) |
| Main route of administration | |
| Intravenous injection | 54.35% |
| Inhalation (smoked) | 23.91% |
| Insufflation (snorted) | 21.74% |
| Cocaine | n = 52 |
| Years of use | 14.44 (8.51) |
| Main route of administrationc | |
| Intravenous injection | 26.00% |
| Inhalation (smoked) | 26.00% |
| Insufflation (snorted) | 48.00% |
aTwelve missing data.
bEleven missing data.
cTwo missing data.