Table 1.
Participant characteristics at intake.
| Characteristica | Naltrexone Prescription (n=32) |
Naltrexone Contingency (n=35) |
Fisher’s Exact (p) |
t-test (p) |
|---|---|---|---|---|
| Age, mean (SEM), years | 46.82 (1.32) | 43.13 (1.53) | 0.08 | |
| Female, % | 31 | 46 | 0.17 | |
| Black, % | 91 | 80 | 0.89 | |
| Married, % | 56 | 63 | 0.89 | |
| High school diploma or GED, % | 62 | 51 | 0.36 | |
| Opiate dependent, %b | 100 | 100 | 0.99 | |
| Cocaine dependent, %b | 97 | 86 | 0.11 | |
| Alcohol use, mean days (SEM), past 30 days | 7.2 (1.9) | 4.9 (1.4) | 0.09 | |
| Majority unemployed past 3 yrs, % | 63 | 66 | 0.80 | |
| Past 30 days income, mean (SEM), $ | ||||
| Employment | 12 (7) | 0 (0) | 0.09 | |
| Welfare | 157 (29) | 108 (26) | 0.21 | |
| Pension, benefits, Social Security | 208 (114) | 71 (34) | 0.26 | |
| Mate, family, friends | 105 (39) | 110 (57) | 0.94 | |
| Illegal | 650 (261) | 1417 (501) | 0.18 | |
| Total income | 1132 (280) | 1707 (486) | 0.32 | |
| $ spent on drugs, mean (SEM), past 30 days | 956 (177) | 2253(535) | 0.03 | |
| Currently on parole/probation, % | 43 | 46 | 0.99 | |
| Lifetime >1 felony conviction, % | 97 | 88 | 0.20 | |
| HIV positive (%) | 16 | 11 | 0.58 | |
| Injection primary route of heroin administration, % | 91 | 97 | 0.26 | |
| Injection primary route of cocaine administration, % | 59 | 81 | 0.06 | |
| Grade levels, mean (SEM)c | ||||
| Reading | 9 (1) | 9 (1) | 0.79 | |
| Spelling | 8 (1) | 8 (1) | 0.75 | |
| Arithmetic | 6 (1) | 7 (1) | 0.53 |
Note. Results for Fisher’s Exact tests and t-tests are based on two-tailed tests with an alpha of .05.
a
Unless otherwise noted, characteristics are taken from the Addiction Severity Index – Lite.
b
Taken from the Composite International Diagnostic Interview.
c
Taken from the Wide Range Achievement Test.