Table 2.
Summary of Recovery and Recurrence by BP Subtype*
| All Subjects (N = 263) |
BP-I (n = 152) |
BP-II (n = 19) |
BP-NOS (n = 92) |
Statistical Analysis† |
P Value | |
|---|---|---|---|---|---|---|
| Rate of recovery, No./total No. (%) | 180/263 (68) | 104/152 (68) | 15/19 (79) | 61/92 (66) | NS | |
| Median time to recovery from the index episode,‡ wk | 78.3 | 52.0a | 42.1a | 140.2b | 13.4 | .001 |
| Rate of recurrence, No./total No. (%) | 101/180 (56) | 60/104 (58)ab | 13/15 (87)a | 28/61 (46)b | 8.4 | .02 |
| Median time to recurrence,§ wk | 61.0 | 45.0a | 19.0a | 69.0b | 9.8 | .008 |
Abbreviations: BP-I, bipolar I disorder; BP-II, bipolar II disorder; BP-NOS: bipolar disorder not otherwise specified; NS, not significant.
*
Values with different superscript letters were significant at P values ≤.05.
†
By the χ2 test.
‡
The index episode was defined as the most recent or current episode from the date of intake. To ascertain the real duration of illness, time to recovery was calculated from the onset of the index episode. Therefore, for some subjects the duration of episode exceeded the length of prospective follow-up.
§
Time to recurrence was calculated from the time subjects fulfilled criteria for recovery until they met full criteria for a new mood episode.