Table 1.
Demographic, substance use related, and psychometrics measures across age and drinking groups.
| Non-heavy drinkers | Heavy drinkers | Age∗drinking interaction | ||||
|---|---|---|---|---|---|---|
| Ages 18–24 (n = 75) | Ages 26–40 (n = 20) | Ages 18–24 (n = 109) | Ages 26–40 (n = 19) | F219 | p | |
| Demographic | ||||||
| Age (years) | 20.7 ± 1.7 | 31.2 ± 4.0 | 20.9 ± 1.7 | 31.5 ± 4.2 | 0.02 | 0.89 |
| Education (years) | 14.7 ± 1.6 | 17.6 ± 1.5 | 14.7 ± 1.5 | 17.6 ± 2.8 | <0.001a | 0.998 |
| SES | 50.6 ± 10 | 53.1 ± 7.7 | 51.4 ± 7.7 | 52.9 ± 9.6 | 0.13 | 0.71 |
| Ethnicity (% non-white) | 25.3 | 40.0 | 29.4 | 26.3 | 0.63† | |
| Sex (% female) | 42.7 | 55.0 | 52.3 | 63.2 | 0.34† | |
| COMT genotype (% ValVal) | 22.7 | 30.0 | 29.4 | 36.8 | 0.73† | |
| Substance use-related | ||||||
| AUDIT – total | 3.5 ± 2.2 | 3.0 ± 1.9 | 12.5 ± 4.8 | 8.5 ± 2.5 | 7.19 | 0.008 |
| AUDIT consumption | 3.0 ± 1.4 | 2.7 ± 1.4 | 6.6 ± 1.9 | 4.8 ± 1.1 | 6.53b | 0.011 |
| AUDIT dependence/harm | 0.9 ± 1.2 | 0.6 ± 1.2 | 6.2 ± 3.8 | 3.7 ± 2.3 | 4.77b | 0.03 |
| RAPI | 2.9 ± 4.0 | 1.5 ± 3.7 | 12.3 ± 7.5 | 7.9 ± 7.7 | 1.77 | 0.19 |
| DUSI | 0.12 ± 0.13 | 0.12 ± 0.13 | 0.39 ± 0.15 | 0.28 ± 0.19 | 4.44 | 0.04 |
| DAST | 1.0 ± 1.4 | 0.85 ± 0.9 | 2.7 ± 2.7 | 2.6 ± 3.5 | <0.001 | 0.99 |
| FTQ density (%) | 13.9 ± 15.5 | 21.5 ± 19.5 | 15.4 ± 16.8 | 22.2 ± 20.8 | 0.019 | 0.89 |
| Psychometric | ||||||
| BIS – total | 56.9 ± 8.7 | 55.7 ± 9.8 | 61.7 ± 9.4 | 55.3 ± 9.9 | 2.55c | 0.11 |
| BIS Attention | 15.4 ± 3.0 | 14.4 ± 4.0 | 16.1 ± 3.7 | 14.6 ± 3.8 | 0.16c | 0.69 |
| BIS Motor | 21.2 ± 3.5 | 20.8 ± 3.1 | 22.4 ± 3.8 | 20.0 ± 3.3 | 2.45c | 0.12 |
| BIS non-planning | 20.3 ± 4.3 | 20.6 ± 5.0 | 23.2 ± 4.5 | 20.7 ± 4.6 | 2.95c | 0.09 |
| FTPI mean ext (years) | 8.6 ± 5.3 | 5.1 ± 4.0 | 7.5 ± 5.8 | 6.9 ± 5.0 | 2.24 | 0.14 |
| FTPI max ext (years) | 30.7 ± 21.8 | 19.8 ± 15.2 | 28.0 ± 23.6 | 23.1 ± 14.2 | 0.62 | 0.43 |
Values are reported as mean ± standard deviation. Reported F and p-values reflect the results testing for significant age by AUDIT group interactions. Exact p-values reported unless p < 0.001. †p-value represents results of χ2 test. aerror = 217, berror = 202; cerror = 218.