Table 1.
Demographics by GABRA2 genotype
| GABRA2 | |||||
|---|---|---|---|---|---|
| Total | Any C | T/T | Χ 2 | p | |
| N | 63 | 45 | 18 | ||
| Male | 45 (71%) | 32 (71%) | 13 (72%) | 0.008 | 0.930 |
| Family history positive | 19 (30%) | 14 (31%) | 5 (28%) | 0.068 | 0.795 |
| Mean (SD) | Mean (SD) | Mean (SD) | t(62) | p | |
| Age | 24.73 (4.24) | 24.47 (4.36) | 25.39 (3.96) | −0.777 | 0.440 |
| Education (years) | 14.60 (2.37) | 14.62 (2.62) | 14.52 (1.62) | 0.100 | 0.920 |
| Drinks/day | 5.99 (2.72) | 6.14 (3.00) | 5.63 (1.90) | 0.669 | 0.506 |
| Drinks/drinking day | 8.63 (3.34) | 8.94 (3.49) | 7.84 (1.90) | 1.183 | 0.241 |
| Binge drinking days | 51.77 (16.42) | 52.30 (15.76) | 50.45 (18.35) | −0.423 | 0.673 |
| % Binge drinking days | 83.71 (20.69) | 85.78 (19.88) | 78.53 (22.27) | −1.332 | 0.187 |
| Dependence severity | 11.58 (5.39) | 10.58 (5.78) | 12.02 (5.23) | 0.973 | 0.335 |
Notes: Drinking frequency data derived from a 90-day Timeline Followback Interview. Family history positive = 2 or more first or second degree relatives with probable alcoholism. Binge drinking = 5 or more drinks per drinking day for men (4 or more for women). Stimulant expectancy measured by a modified Biphasic Alcohol Effects Scale (BAES) assessed prior to beverage administration. Dependence severity measured by the Alcohol Dependence Scale.