Table 1.
Sample characteristics by cocaine status
| COC+ (N = 39) |
COC− (N = 40) |
Statistic | P-value | |
|---|---|---|---|---|
| Demographic characteristics | ||||
| Male, N (%) | 24 (61.5%) | 24 (60.0%) | χ2(1) = .020 | .889 |
| Age in years, M (SD) | 45.44 (6.21) | 43.45 (7.40) | t(77) = 1.29 | .201 |
| Race, N (%) | χ2(2) = 1.28 | .528 | ||
| African American | 32 (82.1%) | 29 (72.5%) | ||
| White | 5 (12.8%) | 9 (22.5%) | ||
| Other or mixed | 2 (5.1%) | 2 (5.0%) | ||
| Education in years, M (SD) | 12.56 (2.46) | 13.75 (2.12) | t(77) = −2.30 | .024 |
| Impulsivity | ||||
| BIS-11 non-planning, M (SD) | 28.03 (4.73) | 21.50 (4.28) | t(77) = 6.43 | < .001 |
| BIS-11 attention, M (SD) | 15.10 (3.75) | 13.23 (3.45) | t(77) = 2.31 | .023 |
| BIS-11 motor, M (SD) | 23.74 (4.99) | 19.93 (3.52) | t(77) = 3.94 | < .001 |
| MCQ ln(k), M (SD) 1 | −2.52 (1.19) | −3.51 (1.83) | t(74) = 2.77 | .007 |
| Other substance use in past 30 days | ||||
| Any alcohol use, n (%) | 34 (87.2%) | 22 (55.0%) | χ2(1) = 9.91 | .002 |
| Days of alcohol use, M (SD) | 12.38 (9.39) | 5.09 (6.51) | t(54) = 3.18 | .002 |
| Any cannabis use, n (%) | 18 (46.2%) | 10 (25.0%) | χ2(1) = 3.86 | .049 |
| Days of cannabis use, M (SD) | 12.00 (11.25) | 24.20 (9.16) | t(26) = −2.93 | .007 |
| Daily cigarette use, N (%) | 25 (64.1%) | 14 (35.0%) | χ2(1) = 6.69 | .010 |
1
Three participants had MCQ scores that did not pass the standard QA checks.