Table 1.
Sample characteristics (n = 141).
| Variable n (%) or mean (range) | Control | Bipolar disorder | p |
|---|---|---|---|
| Number, n | 91 | 50 | |
| Age, years; mean (sd) | 33.50 (15.68) | 43.52 (12.83) | < 0.001 |
| Female sex, n (%) | 44 (48.4%) | 25 (50%) | 0.853 |
| Smoking, n (%) | 11 (12.1%) | 18 (36%) | 0.001 |
| Age at onset, years; mean (sd) | None | 26.37 (11.45) | |
| Number of episodes; mean (sd) | None | 6.39 (5.12) | |
| Childhood trauma score (mean, sd) | 31.77 (8.37) | 36.56 (10.28) | 0.004 |
| BIPOLAR DISORDER GROUP | |||
| Bipolar I, n | None | 46 | |
| Bipolar II, n | None | 4 | |
| Bipolar disorder Not Otherwise Specified (NOS), n | None | 0 | |