Table 1.
Total sample and mixity group characteristics and differences
| Total sample | Asymptomatic | Mixed | Depression Only | Mania Only | Group Difference1 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| N | Mean (SD) or % (N) | N | Mean (SD) or % (N) | N | Mean (SD) or % (N) | N | Mean (SD) or % (N) | N | Mean (SD) or % (N) | F [DF], p | |
| Age (in years) | 804 | 56.8 (11.4) | 63 | 61.8 (7.8) | 559 | 55.3 (11.9) | 148 | 59.5 (9.5) | 34 | 60.5 (10.5) | F[3,800]=.339, p=.80 |
| Gender (% female) | 804 | 58.7% (472) | 63 | 61.9% (39) | 559 | 58.9% (329) | 148 | 55.4% (82) | 34 | 64.7% (22) | F[3,800]=.23, p=.87 |
| Education (in years) | 662 | 13.2 (3.8) | 56 | 12.0 (5.4) | 466 | 13.4 (3.4) | 113 | 13.4 (3.9) | 27 | 11.2 (5.5) | F[3,658]=3.6, p=.014 |
| Employment (% currently working) | 568 | 26.8% (152) | 20 | 40.0% (8) | 426 | 23.7% (101) | 106 | 35.8% (38) | 16 | 31.3% (5) | F[3,564]=.32, p=.81 |
| BD subtype (% Type I) | 734 | 75.2% (552) | 36 | 72.2% (26) | 537 | 73.9% (397) | 138 | 79.7% (110) | 23 | 82.6% (19) | F[3,674]=.191, p=.90 |
| Age of onset (in years) | 650 | 27.6 (14.2) | 58 | 35.7 (14.2) | 442 | 25.8 (13.9) | 121 | 28.9 (13.1) | 29 | 34.5 (15.0) | F[3,646]=.94, p=.42 |
| Mania severity (YMRS)* | 805 | 4.8 (5.4) | 63 | 0.0 (0.0) | 560 | 6.6 (5.2) | 148 | 0.0 (0.0) | 34 | 6.5 (6.2) | F[1,592]=.066, p=.80 |
| Depression 3-level | F[6,797]=.819, p=.55 | ||||||||||
| Depression group (% Lower) | 805 | 66.0% (531) | 63 | 0.0% (0) | 560 | 70.4% (394) | 148 | 92.6% (137) | 34 | 0.0% (0) | -- |
| Depression group (% Higher) | 805 | 22% (177) | 63 | 0.0% (0) | 560 | 29.6% (166) | 148 | 7.4% (11) | 34 | 0.0% (0) | -- |
| GAF | 439 | 61.1 (12.8) | 30 | 79.7 (11.2) | 343 | 58.7 (11.5) | 48 | 63.1 (12.7) | 18 | 70.1 (9.6) | F[3,435]=16.1, p=<0.001 |
Note: BD=bipolar disorder; YMRS= Young Mania Rating Scale Score; GAF= Global Assessment of Functioning; bold indicates significant at P< .05
1
Model included study cohort as a random intercept
*
Total mean YMRS score