Table 1.
Mean concentration of plasma norepinephrine (pg/ml) and standard deviation in major depressive disorder, psychotic depression and three other subcategories.
| n | NE (SD) | p | |
|---|---|---|---|
| MDD | 78 | 505 (255) | |
| Psychotic | 9 | 657 (276) | 0.057 |
| Nonpsychotic | 69 | 485 (247) | |
| Melancholic | 36 | 546 (292) | 0.188 |
| Nonmelancholic | 42 | 470 (217) | |
| HAR | 26 | 530 (268) | 0.548 |
| Non-HAR | 52 | 493 (251) | |
| ANA | 14 | 543 (276) | 0.447 |
| Non-ANA | 61 | 486 (245) |
ANA, depression with above normal arginine vasopressin concentration; HAR, highly anxious retarded depression; MDD, major depressive disorder; melancholic, Diagnostic and Statistical Manual of Mental Disorders IV melancholia; NE, norepinephrine; SD, standard deviation. p Values of uncorrected Student’s t-tests; n = number of patients.