Table 1.
Demographical and behavioral data of healthy controls (HC) and patients with major depression (MD)
| HC | MD | t-test | ||
|---|---|---|---|---|
| Mean (sem) | Mean (sem) | t | P | |
| Demographical data | ||||
| Age (years) | 23.06 (1.03) | 28.69 (1.15) | – 4.41 | 0.001 |
| Education (school years) | 10.82 (0.41) | 10.81 (0.42) | 0.02 | 0.985 |
| Smoking behavior | ||||
| Subjects smoking cigarettes (n/total) | 4/17 | 3/16 | ||
| Cigarettes per day | 7 (8.98) | 12 (9.85) | – 1.84 | 0.515 |
| Psychometric measures | ||||
| BDI | 3.24 (0.96) | 33.63 (2.87) | – 11.86 | 0.000 |
| BIS | 57.76 (1.91) | 65.25 (2.04) | – 3.25 | 0.012 |
| Incorrect incongruent NoGo trials | ||||
| Errors of commission | 13.24 (2.68) | 7.75 (1.10) | 2.36 | 0.074 |
| Reaction time (ms) | 420.63 (15.31) | 452.28 (15.45) | – 1.77 | 0.156 |
Statistical analyses were conducted by two-sided unpaired samples t-tests. Significant results (p < 0.05) are highlighted in italic font
BDI beck depression inventory, BIS barratt impulsiveness scale, sem standard error of the mean, ms milliseconds