Table 2 Additional characteristics of respondents with bipolar disorder
From: The economic and humanistic burden of bipolar disorder in adults in the United States
Characteristic | Respondents with bipolar disorder by depressive symptom severity | ||
|---|---|---|---|
None/mild (n = 1401) | Moderate (n = 889) | Severe (n = 1293) | |
Number of depressive episodes in the past year, mean (SD) | 3.1 (5.0) | 4.5 (5.3)b | 7.4 (7.3)b |
Number of manic episodes in the past year, mean (SD) | 2.6 (4.6) | 3.7 (5.1)b | 5.3 (6.2)b |
Number of hospitalizations related to mood, emotions, or behavior in the past year, mean (SD) | 0.7 (3.9) | 1.5 (5.2)b | 1.5 (6.0)b |
Type of bipolar disorder, n (%)a | |||
 Type I | 394 (40.7%) | 184 (37.0%) | 334 (40.5%) |
 Type II | 365 (37.7%) | 222 (44.7%) | 322 (39.1%) |
 Unspecified | 208 (21.5%) | 91 (18.3%) | 168 (20.4%) |
Age at diagnosis of bipolar disorder, mean (SD)a | 27.3 (12.6) | 24.8 (12.2)b | 24.9 (11.5)b |
Healthcare practitioner who diagnosed bipolar disorder, n (%)a | |||
 Psychiatrist | 634 (65.6%) | 283 (56.9%) | 473 (57.4%) |
 Primary Care Physician/General Practitioner/Internist | 143 (14.8%) | 86 (17.3%) | 137 (16.6%) |
 Psychologist | 116 (12.0%) | 81 (16.3%) | 137 (16.6%) |
 Nurse Practitioner/Physician Assistant in a psychiatry practice | 29 (3.0%) | 18 (3.6%) | 27 (3.3%) |
 Nurse Practitioner/Physician Assistant in a primary care physician/general practitioner/internist practice | 16 (1.7%) | 11 (2.2%) | 17 (2.1%) |
 Other | 29 (3.0%) | 18 (3.6%) | 33 (4.0%) |
Diagnosis of MDD prior to bipolar disorder diagnosis, n (%)a | 582 (60.2%) | 361 (72.6%)b | 636 (77.2%)b |