Table 1.
Demographics and cocaine use of the study participants.
| Cocaine (N=18) | Control (N=15) | Test Statistic | |
|---|---|---|---|
| Gender: Male / Female | 15/3 | 9/6 | χ2=2.25 |
| Race: African-American / Caucasian / Asian / Other | 17/1/0/0 | 10/2/2/1 | χ2=4.92 |
| Age (years) | 51.0 ± 2.9 | 41.1 ± 10.4 | t=3.58* |
| Educational attainment (some high school / high school graduate / some college / college graduate) | 1/4/10/3 | 0/1/5/9 | χ2=7.25 |
| Verbal IQ: Wide Range Achievement Test (grade equivalent) | 12.6 ± 0.5 | 12.8 ± 0.5 | t=1.07 |
| Nonverbal IQ: WASI - Matrix Reasoning Scale | 9.9 ± 2.2 | 11.2 ± 3.2 | t=1.32 |
| Depression: Beck Depression Inventory II | 4.2 ± 3.6 | 1.7 ± 4.4 | U=55.5* |
| Smoking status (smoker / nonsmoker) | 17/1 | 2/13 | χ2=22.04* |
| Cigarettes per day (among current smokers) | 7.9 ± 5.5 | 4.3 ± 0.4 | t=0.89 |
| Body Mass Index (BMI) | 26.4 ± 3.9 | 28.6 ± 5.5 | t=1.17 |
| History of Comorbidity (No/Yes) | 7/11 | -- | -- |
| Cocaine urine status: positive / negative | 12/6 | -- | -- |
| Cocaine age of onset (years) | 23.5 ± 7.7 | -- | -- |
| Cocaine duration of use (years) | 21.1 ± 7.9 | -- | -- |
| Cocaine past month use: days/week | 2.2 ± 1.7 | -- | -- |
| Cocaine past month use: $/use | 120.8 ± 76.6 | -- | -- |
| Cocaine current abstinence: days | 6.9 ± 7.3 | -- | -- |
| Withdrawal symptoms: CSSA (0–126) | 17.1 ± 9.4 | -- | -- |
| Severity of Dependence Scale (0–15) | 5.1 ± 3.7 | -- | -- |
| Cocaine Craving Questionnaire (0–45) | 23.4 ± 11.5 | -- | -- |
Note. Values are frequencies or means ± standard deviation;
*
p<0.05.