Table 1.
Participant demographic information
| Control (n = 77) | Bipolar disorder (n = 68)a | ||
|---|---|---|---|
| Euthymic (n = 22) | Acute (n = 43) | ||
| Sex (M:F) | 30:47 | 12:10 | 11:32 |
| Age, mean (SD) | 41.0 (10.3) | 43.6 (10.5) | 42.6 (10.3) |
| Years of education, mean (SD) | 14.8 (2.4) | 14.4 (2.3) | 13.1 (3.3) |
| Age at onset, mean (SD) | – | 25.0 (7.1) | 24.6 (8.9) |
| Illness duration, years, mean (SD) | – | 18.6 (11.4) | 18.1 (12.0) |
| YMRS score, mean (SD) | – | 3.9 (3.9) | 16.0 (9.9) |
| MADRS score, mean (SD) | – | 3.6 (2.6) | 15.3 (9.9) |
| Psychotic features present, n | – | 12 | 15 |
| Medication (on:off) | – | 21:1 | 30:13 |
| Smokes > 1 pack cigarettes/week, n | 12 | 10 | 13 |
| Substance abuse or dependence history, n | – | 10 | 15 |
a
Young Mania Rating Scale (YMRS) and Montgomery-Åsberg Depression Rating Scale (MADRS) measures were not completed proximal to the electroencephalograph date for three bipolar disorder patients, of whom two were off medications. Therefore, these three patients were not included in either illness phase category.