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Participants demographics according to COMT genotype.
| Met/Met | Val/Met | Val/Val | |
|---|---|---|---|
| Age | 63.6 (6.6) | 66.2 (7.4) | 63.5 (6.9) |
| MMSE | 29.5 (.62) | 29.2 (.77) | 29.5 (.60) |
| NART IQ | 120.7 (5.7) | 123.7 (2.5) | 120.8 (6.0) |
| BDI | 4.4 (3.4) | 3.2 (3.0) | 3.9 (2.7) |
| Gender(M/F) | 7:10 | 8:7 | 8:12 |
| N | 17 | 15 | 20 |
