Table 1.
Demographic, descriptive characteristics of the sample, and log transformed k by group.
| Variable | − Suicide Attempt (n = 378) |
+ Suicide Attempt (n = 88) |
Statistic | p |
|---|---|---|---|---|
| Gender (female) | 27.25% | 43.18% | χ2 = 8.587 | .003 |
| Race/Ethnicity | ||||
| Caucasian | 12.70% | 12.50% | χ2 = .003 | .960 |
| African American | 82.80% | 81.81% | χ2 = .048 | .826 |
| Hispanic | 3.44% | 3.41% | χ2 < .001 | .989 |
| Other | 0.79% | 2.27% | χ2 = 1.471 | .225 |
| Age in years, M (S.D.) | 42.19 (8.24) | 42.16 (8.08) | t = −.027 | .979 |
| Education years, M (S.D.) | 11.62 (1.80) | 11.72 (2.04) | t = .387 | .699 |
| HIV-seropositive | 26.98% | 47.73% | χ2 = 14.38 | <.001 |
| Hepatitis C-seropositive | 17.46% | 22.99% | χ2 = 1.434 | .231 |
| Substance Dependence | ||||
| Alcohol | 74.54% | 76.14% | χ2 = .097 | .755 |
| Cocaine | 80.00% | 84.09% | χ2 = .768 | .381 |
| Opioid | 50.53% | 42.05% | χ2 = 2.05 | .152 |
| Mood Disorders | ||||
| Bipolar Disorder | 2.65% | 12.50% | χ2 = 16.11 | <.001 |
| Major Depression | 15.34% | 31.81% | χ2 = 12.87 | <.001 |
| DD log k | ||||
| Small reward | −1.395 (.035) | −1.362 (.077) | ||
| Large reward, | −1.630 (.041) | −1.406 (.090) |