Table 2. Participant Demographics, Past 3 Month Substance Use, and DSM-IV Diagnostic Status.
| Control | SubDep | SubDep+HCCD | ||||
|---|---|---|---|---|---|---|
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| Male (n = 68) | Female (n = 84) | Male (n = 87) | Female (n = 71) | Male (n = 48) | Female (n = 24) | |
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| Age | 20.68 (1.62)a | 20.76 (1.92)a | 21.36 (2.31) | 20.68 (1.84) | 22.71 (3.24)b | 22.63 (3.89)b |
| Years of education | 14.12 (1.46)a | 14.32 (1.74)a | 14.05 (1.68) | 13.84 (1.59) | 13.16 (1.74)b | 13.08 (1.86)b |
| Estimated IQ† | 115.47 (10.86)a | 112.99 (11.73)a | 113.02 (10.98)b | 108.52 (9.71)b | 109.17 (7.61)b | 109.08 (9.84)b |
| AC total score | 32.51 (9.26)a | 30.95 (9.62)a | 29.80 (9.98)b | 29.06 (9.66)b | 27.48 (8.98)b | 29.79 (8.91)b |
| AC total score/IQ composite | 0.59 (1.55)a | 0.19 (1.76) a | 0.07 (1.75)b | -0.42 (1.601)b | -0.53 (1.35)b | -0.29 (1.49)b |
| Current student (%)† | 91 | 93 | 76 | 83 | 50 | 71 |
| Alcohol and drug use | ||||||
| Alcohol frequency | 1.03 (1.13)a | 1.25 (1.31)a | 3.20 (1.75)b | 3.21 (1.37)b | 2.63 (1.86)c | 2.29 (1.68)c |
| Alcohol quantity† | 4.93 (8.07)a | 5.63 (7.89)a | 28.29 (28.11)b | 24.25 (21.78)b | 27.15 (35.27)b | 15.88 (14.23)b |
| Marijuana frequency† | 0a | 0a | 2.78 (3.07)b | 1.68 (2.58)b | 3.46 (3.13)c | 2.50 (2.98)c |
| Other drug frequency | 0a | 0a | 0.07 (0.33)a | 0.14 (0.76)a | 0.56 (1.37)b | 0.92 (2.21)b |
| DSM diagnoses (n meeting criteria) | ||||||
| Alcohol abuse | 0 | 0 | 20 | 11 | 12 | 5 |
| Alcohol dependence | 0 | 0 | 57 | 58 | 34 | 18 |
| Marijuana abuse | 0 | 0 | 12 | 14 | 3 | 3 |
| Marijuana dependence | 0 | 0 | 51 | 22 | 36 | 14 |
| Other Drug abuse | 0 | 0 | 5 | 1 | 4 | 1 |
| Other Drug dependence | 0 | 0 | 14 | 16 | 20 | 10 |
| HCCD | 0 | 0 | 0 | 0 | 48 | 24 |
| ASPD | 0 | 0 | 0 | 0 | 36 | 14 |
Note. AC = Auditory Consonant; HCCD = a history of childhood conduct disorder; ASPD = antisocial personality disorder, Sub Dep = Substance dependent group, SubDep+HCCD = Substance Dependent + HCCD group. Substance use measures represent average weekly values for the 3 months prior to participation in the study. Values are mean (SD) unless otherwise noted. Means with different superscripted letters are significantly different, p < .05.
†
Significant main effect of Sex, p < .05.