Table 1.
Demographic data.
| A1+ | A1− | ||
|---|---|---|---|
| BEHAVIORAL EXPERIMENT | |||
| Women/Men | 14/10 | 13/9 | χ2 < 0.01; p = 0.958 |
| Mean age | 24.2 ± 2.9 | 23.1 ± 2.7 | t(44) = 1.28; p = 0.206 |
| Smokers/Nonsmokers | 8/16 | 6/16 | χ2 = 0.20; p = 0.655 |
| COMT mm/vm/vv | 10/9/5 | 6/12/4 | χ2 = 1.46; p = 0.483 |
| fMRI EXPERIMENT | |||
| Women/Men | 10/5 | 9/8 | χ2 = 0.62; p = 0.430 |
| Mean age | 22.3 ± 1.9 | 23.6 ± 2.9 | t(30) = −1.43; p = 0.162 |
| Smokers/Nonsmokers | 3/12 | 6/11 | χ2 = 0.92; p = 0.337 |
| COMT mm/vm/vv | 3/8/4 | 5/7/5 | χ2 = 0.56; p = 0.758 |
Gender distribution, age (average ± SD), number of smokers and nonsmokers and COMT Val108/158Met occurrence (mm, met homozygotes; vm, val/met heterozygotes; mm, met homozygotes) of the participants.