Table 1.
Comparison of demographics of patients with diagnosis of bipolar I or bipolar II disorder
| Diagnosis | |||||
|---|---|---|---|---|---|
| Bipolar I (N = 247) | Bipolar II (N = 146) | Total (N = 393) | Degrees of freedom (DF) | P | |
| Age (mean years, SD) | 39.4 (11.2) | 38.2 (11.4) | 39.0 (11.3) | 299.1a | 0.299 |
| Age of onset (mean years, SD) | 22.6 (9.7) | 20.9 (10.9) | 22.0 (10.2) | 240.4a | 0.133 |
| Years of illness (mean years, SD) | 16.9 (11.1) | 17.7 (12.3) | 17.2 (11.5) | 241.7a | 0.535 |
| Hospitalizations (mean N, SD) | 2.8 (4.2) | 1.4 (3.2) | 2.3 (3.9) | 326.1a | 0.001 |
| Gender | 1b | 0.059 | |||
| Female (N, %) | 160 (65) | 108 (74) | 268 (68) | ||
| Male (N, %) | 87 (35) | 38 (26) | 125 (32) | ||
| Education level | 2b | 0.274 | |||
| High school (N, %) | 33 (14) | 12 (9) | 45 (12) | ||
| Some college (N, %) | 75 (33) | 45 (33) | 120 (33) | ||
| College graduate (N, %) | 121 (53) | 79 (58) | 200 (55) | ||
| Employment status | 2b | 0.079 | |||
| Disabled (N, %) | 66 (29) | 25 (19) | 91 (25) | ||
| Working full-time (N, %) | 102 (44) | 72 (56) | 174 (49) | ||
| Other (N, %) | 61 (27) | 33 (25) | 94 (26) | ||
| Marital status | 2b | 0.370 | |||
| Married (N, %) | 107 (46) | 66 (50) | 173 (47) | ||
| Single (N, %) | 90 (39) | 52 (39) | 142 (39) | ||
| Divorced (N, %) | 37 (15) | 14 (11) | 51 (14) | ||
| Number of daily medications (mean N, SD) | 2.8 (1.6) | 2.6 (1.5) | 2.7 (1.6) | 322.8a | 0.330 |
| Taking mood stabilizer (N, %) | 204 (83) | 111 (76) | 315 (80) | 1b | 0.115 |
| Taking lithium (N, %) | 78 (32) | 30 (21) | 108 (28) | 1b | 0.018 |
| Taking valproate (N, %) | 49 (20) | 32 (22) | 81 (21) | 1b | 0.622 |
| Taking lamotrigine (N, %) | 82 (33) | 66 (45) | 148 (38) | 1b | 0.018 |
| Taking antidepressant (N, %) | 110 (45) | 92 (63) | 202 (51) | 1b | <0.001 |
| Taking antipsychotic (N, %) | 114 (46) | 57 (39) | 171 (44) | 1b | 0.169 |
| Taking benzodiazepine (N, %) | 51 (21) | 35 (24) | 86 (22) | 1b | 0.441 |
| Taking sleep medication (N, %) | 18 (7) | 7 (5) | 25 (6) | 1b | 0.328 |
aStudent’s t test, equal variances not assumed
bPearson Chi-Square test