Table 1.
Demographic and drug use characteristics of the sample.
| CDI (n = 17) |
CDI + Cluster B (n = 17) |
CDI + Cluster C (n = 12) |
F | p | ||||
|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | |||
| DEMOGRAPHICS | ||||||||
| Gender (male/female) | 16/1 | 9/8 | 12/0 | |||||
| ADHD | 1 | 3 | 0 | |||||
| Age | 34.53 | 7.34 | 34.18 | 8.85 | 33.67 | 5.93 | 0.045 | 0.956 |
| Total IQ | 95.76 | 8.62 | 97.76 | 9.93 | 98 | 8.01 | 0.294 | 0.747 |
| Verbal IQ | 100.53 | 7.58 | 101.59 | 11.11 | 101.50 | 7.42 | 0.069 | 0.933 |
| Performance IQ | 97.59 | 10.02 | 97.88 | 8.27 | 99.83 | 13.13 | 0.186 | 0.831 |
| PATTERNS OF DRUG USE | ||||||||
| Cocaine | ||||||||
| Cocaine grams per month | 17.74 | 25.99 | 21.18 | 27.56 | 8.25 | 7.57 | 1.107 | 0.340 |
| Cocaine duration of use (months) | 54.79 | 60.04 | 48.41 | 46.76 | 69.33 | 54.52 | 0.538 | 0.588 |
| Cocaine duration of abstinence (months) | 2.86 | 5.57 | 4.74 | 6.06 | 1.67 | 0.84 | 1.382 | 0.262 |
| Alcohol | ||||||||
| Alcohol standard units per month | 25 | 29.92 | 25.53 | 40.09 | 30.33 | 38.87 | 0.087 | 0.916 |
| Alcohol duration of use (months) | 82.76 | 95.94 | 51.74 | 70.52 | 70 | 73.05 | 0.621 | 0.542 |
| Tobacco | ||||||||
| Tobacco cigarettes per month | 464.71 | 448.07 | 334.65 | 254.04 | 264.17 | 227.69 | 1.369 | 0.265 |
| Tobacco duration of use (months) | 111.18 | 123.59 | 119.88 | 122.21 | 88.75 | 91.60 | 0.262 | 0.771 |
CDI = cocaine dependence individuals; ADHD = attention-deficit hyperactivity disorder.