Table 1.
Sample Characteristics
| Family history | FH− | FH+ | p-Values |
|---|---|---|---|
| N (M/F) | 155 (73/82) | 143 (52/91) | 0.06 |
| Age (years) | 23 (0.2) | 24 (0.3) | |
| Education (years) | 14.8 (0.1) | 14.5 (0.1) | |
| SES | 49 (1.1) | 41 (1.1) | <0.0001 |
| Shipley mental age | 17.2 (0.1) | 17.0 (0.1) | |
| Ethnicity (%) | 0.007 | ||
| Caucasian | 90 | 76 | |
| African American | 6 | 13 | |
| Hispanic | 3 | 2 | |
| Native American | 2 | 6 | |
| Other | 0 | 3 | |
| CPI-So | 33.1 (0.4) | 29.2 (0.4) | <0.0001 |
| BDI | 3.5 (0.3) | 5.9 (0.4) | <0.0001 |
| EPI-neuroticism | 4.8 (0.3) | 6.6 (0.3) | <0.0001 |
| EPI-extraversion | 12.6 (0.3) | 12.1 (0.3) | |
| EPI-impulsivity | 4.1 (0.1) | 4.3 (0.2) | |
| AUDIT | 3.1 (0.2) | 3.8 (0.3) | 0.05 |
| Alcohol intake (standard drinks/month) | 40 (3) | 51 (4) | 0.02 |
| Caffeine (mg/d) | 118 (12) | 122 (11) | |
| Tobacco (% using weekly) | 9 | 18 | 0.02 |
Entries (mean ± SEM) unless given otherwise. SES scores shown are considered “Middle Class.” Variables were compared with between group t-tests. Only ps < 0.10 are shown.
FH−, negative family history; FH+, positive family history; M, male; F, female; SES, Hollingshead & Redlich Socioeconomic Status Score; Shipley mental age, Shipley Institute of Living Mental Age Score; CPISo, California Personality Inventory Sociability Scale; BDI, Beck Depression Inventory; EPI, Eysenck Personality Inventory; AUDIT, Alcohol Use Disorders Identification Test.