Appendix A.
Characteristics and experiences of participants by knowledge of buprenorphine treatment
| Do you know about buprenorphine? | |||
|---|---|---|---|
| No (n=102; 13%) |
Yes (n=687; 87%) |
Total (n=789) |
|
| Randomization status, %*** | |||
| Buprenorphine | 3.0 | 66.5 | 58.3 |
| Methadone | 97.1 | 33.5 | 41.7 |
| Female, % | 37.3 | 34.0 | 34.4 |
| Age, %*** | |||
| 22-24 | 0.0 | 2.0 | 1.8 |
| 25-34 | 16.7 | 37.9 | 35.1 |
| 35-44 | 17.7 | 22.1 | 21.6 |
| 45-54 | 42.2 | 23.7 | 26.1 |
| 55-64 | 22.6 | 13.7 | 15.0 |
| 65+ | 1.0 | 0.6 | 0.6 |
| Age, mean (sd)** | 46.6 (10.3) | 40.9 (11.1) | 41.6 (11.2) |
| Race/ethnicity, % | |||
| White | 63.7 | 74.1 | 72.8 |
| Black | 11.8 | 8.7 | 9.1 |
| Hispanic | 17.7 | 10.2 | 11.2 |
| Other | 6.9 | 7.0 | 7.0 |
| Years of education, %* | |||
| Less than high school | 27.5 | 17.6 | 18.9 |
| High school | 46.1 | 45.0 | 45.1 |
| College or more | 26.5 | 37.4 | 36.0 |
| Years of education, mean (sd)** | 11.9 (1.9) | 12.5 (1.9) | 12.4 (1.9) |
| Employment status, %*** | |||
| Employed full time | 12.8 | 19.8 | 18.9 |
| Employed part time | 5.9 | 12.2 | 11.4 |
| Unemployed, looking for work | 22.6 | 30.3 | 29.3 |
| Not in the labor force | 58.8 | 37.7 | 40.4 |
| Months incarcerated in lifetime, mean (sd) | 29.5 (37.4) | 23.9 (33.5) | 24.5 (34.0) |
| ASI severity scores, mean (sd) | |||
| Alcohol | 0.07 (0.16) | 0.07 (0.15) | 0.07 (0.15) |
| Drug | 0.18 (0.13) | 0.18 (0.14) | 0.18 (0.14) |
| Medical | 0.31 (0.35) | 0.31 (0.36) | 0.31 (0.36) |
| Employment | 0.69 (0.30) | 0.64 (0.32) | 0.64 (0.32) |
| Legal | 0.08 (0.15) | 0.14 (0.19) | 0.09 (0.17) |
| Family | 0.12 (0.16) | 0.14 (0.19) | 0.14 (0.18) |
| Psychiatric | 0.24 (0.22) | 0.23 (0.23) | 0.23 (0.23) |
| Age at first use of primary drug, mean (sd) | 21.4 (7.9) | 22.3 (7.8) | 22.2 (7.8) |
| Years of alcohol and drug use in lifetime, mean (sd) | |||
| Alcohol* | 13.3 (12.2) | 10.2 (10.5) | 10.6 (10.8) |
| Heroin | 12.7 (11.4) | 10.8 (9.9) | 11.0 (11.4) |
| Opiates | 5.0 (8.1) | 4.4 (7.1) | 4.5 (7.2) |
| Cocaine* | 7.2 (10.1) | 5.0 (9.5) | 5.3 (8.0) |
| Amphetamine* | 0.5 (1.1) | 0.8 (3.0) | 0.7 (2.8) |
| Methamphetamine | 3.4 (7.2) | 2.4 (6.2) | 2.5 (6.3) |
| Cannabis | 10.6 (11.1) | 10.2 (10.6) | 10.2 (10.7) |
| AUDIT-C score, mean (sd) | 2.0 (3.0) | 1.9 (2.6) | 1.9 (2.6) |
| Exposure to treatment in lifetime, mean (sd) | |||
| Number of drug treatments** | 4.9 (3.4) | 7.5 (7.8) | 7.1 (7.5) |
| Number of drug detoxifications** | 1.7 (2.3) | 3.2 (2.9) | 3.0 (4.5) |
| Number of alcohol treatments | 0.5 (0.3) | 0.6 (0.4) | 0.6 (2.8) |
| Number of alcohol detoxifications* | 0.7 (0.9) | 2.1 (5.7) | 1.8 (5.1) |
| Total number of drug and alcohol treatments in lifetime, mean (sd)** | 6.5 (5.3) | 10.7 (12.0) | 10.1 (11.5) |
| Total number of drug and alcohol detoxifications in lifetime, mean (sd) | 0.7 (1.6) | 0.9 (5.0) | 0.9 (4.7) |
| State, %** | |||
| California | 43.1 | 26.8 | 28.9 |
| Connecticut | 13.7 | 30.1 | 28.0 |
| Oregon | 11.8 | 23.0 | 21.6 |
| Pennsylvania | 11.8 | 9.3 | 9.6 |
| Washington | 19.6 | 10.8 | 11.9 |
*
p<.05
**
p<.01
***
p<.001