Table 1. Subject Demographics.
| Mean/count | Range/percentage | |
|---|---|---|
| Age | 30.0±8.4 | 19–50 |
| Gender | ||
| Male | 34 | 50.8% |
| Female | 33 | 49.2% |
| Ethnicity | ||
| Caucasian | 42 | 62.7% |
| Hispanic | 9 | 13.4% |
| African American | 8 | 11.9% |
| Asian | 5 | 7.5% |
| Mixed | 3 | 4.5% |
| COMT Genotype | ||
| Met 158 Met | 16 | 23.9% |
| Met 158 Val | 27 | 40.3% |
| Val 158 Val | 22 | 32.8% |
| Unknown | 2 | 3.0% |
| AUDIT | 9.3±4.9 | 2–24 |
| BIS | 59.6±9.3 | 35–82 |
| LOC | 13.0±3.6 | 3–20 |
| STAI—Trait | 34.6±8.1 | 20–57 |
Abbreviations: AUDIT, alcohol use disorders identification test; BIS, Barratt impulsiveness scale; COMT, catechol-O-methyltransferase; LOC, Rotter's locus of control; STAI-Trait, State-trait anxiety scale, trait subscale.
Table data include one outlier subject who was excluded from subsequent analyses (see Materials and Methods section).