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Demographic data
| COMT Genotype group | Statistical significance of group differences | ||
|---|---|---|---|
| met/met N = 19 |
val carriers N = 38 |
||
| Males/females | 12/7 | 15/23 | (χ2 = 2.85; p = 0.091) |
| Smokers/Non-smokers | 7/12 | 17/21 | (χ2 = 0.32; p = 0.569) |
| Mean age (years)/SD | 31.6/11.0 | 37.2/10.9 | (t = 1.80; p = 0.077) |
