Table I.
Characteristics of the study population
| SDPG (n = 20) | SD (n = 20) | Control (n = 16) | |
|---|---|---|---|
| Age | 35 (7) | 35 (7) | 37 (9) |
| Gender (M/F) | 12/8 | 10/10 | 5/11 |
| Education | 11 (2) | 11 (3) | *14 (2) |
| Ethnicity | |||
| Caucasian | 14 | 16 | 12 |
| African American | 3 | 0 | 2 |
| Hispanic | 3 | 2 | 2 |
| SOGSa | *10.7 (4.4) | 0.2 (0.4) | 0.1 (0.3) |
| Mean numberb | 3.8 (1.7) | 3.1 (1.0) | na |
| % Substance depc | |||
| Cocaine | 75% | 75% | na |
| Alcohol | 70% | 70% | na |
| Amphetamine | 70% | 60% | na |
| Cannabis | 55% | 60% | na |
| Opiates | 40% | 25% | na |
| Hallucinogens | 25% | 5% | na |
| Sedative | 15% | 5% | na |
| Club drugs | 0% | 10% | na |
| Inhalants | 0% | 0% | na |
| Phencyclidine | 0% | 0% | na |
| Tobacco | ***30% | 0% | 6.3% |
| IQ | 100 (11) | 103 (12) | **113 (9) |
| Impulsivity | 76 (15) | 73 (12) | *55 (8) |
| IMP‐SSd | 13 (6) | 12 (5) | ***7 (5) |
Data are mean (SD).
a
South Oaks Gambling Screen (SOGS) (Lesieur and Blume, 1987).
b
Mean number = Mean number of substances on which participants met criteria for dependence (CIDI‐SAM ≥3).
c
Substance dep, % of participants who met criteria for dependence for that drug.
Impulsivity and sensation seeking (IMP‐SS).
****P = 0.06, Pearson χ 2.
*
P < 0.005, control vs. SDPG, control vs. SD.
**
P < 0.01, control vs. SDPG, control vs. SD.
***
P < 0.05, control vs. SDPG, control vs. SD.