Table 1.
Basic Demographic, Physical, and Psychological Characteristics of the Study Sample (Means Plus SD in Parentheses)
| Pramipexole (n = 21; 10 male) |
Placebo (n = 19; 10 male) |
Between-group comparison (t test) | |
|---|---|---|---|
| Age | 22.5 (3.7) | 24.5 (6.9) | P = .26 |
| Body mass index | 22.4 (2.6) | 24.0 (2.9) | P = .07 |
| Years in full-time education | 16.8 (2.9) | 17.5 (3.1) | P = .49 |
| IQ estimate (Spot-the-Word Test) | 108.3 (8.1) | 111.9 (7.6) | P = .16 |
| Neuroticism (Eysenck Personality Questionnaire) | 4.2 (3.7) | 4.3 (3.7) | P = .98 |
| Psychoticism (Eysenck Personality Questionnaire) | 2.5 (2.1) | 2.8 (2.1) | P = .64 |
| Extraversion (Eysenck Personality Questionnaire) | 14.7 (4.5) | 14.5 (3.7) | P = .89 |
| Lie (Eysenck Personality Questionnaire) | 9.5 (4.6) | 7.5 (3.4) | P = .12 |
| Trait anxiety (State-Trait Anxiety Inventory) | 31.2 (9.1) | 32.1 (9.1) | P = .77 |
| Depression at inclusion (Beck Depression Inventory) | 1.6 (1.7) | 2.5 (4.0) | P = .39 |
N.B.: Uneven distribution of pramipexole and placebo treatment due to random replacement of participant dropouts.