Table 1.
Subject Demographics and Symptom Scale Characteristics
| All Patients | Schizophrenia | Schizoaffective | Bipolar I | |
|---|---|---|---|---|
| n | 455 | 181 | 117 | 157 |
| Mean age (SD) | 36.2 (12.7) | 35.8 (12.6) | 36.0 (12.1) | 36.7 (13.3) |
| Sex M: Fa | 220:235 | 118:63 | 56:61 | 46:111 |
| (%M:%F) | 48%:52% | 65%:35% | 48%:52% | 29%:71% |
| Race (%)a,b | AA:184 (40%) | AA:94 (52%) | AA:52 (44%) | AA:38 (24%) |
| CA:242 (53%) | CA:73 (40%) | CA:58 (50%) | CA:111 (71%) | |
| OT:29 (6%) | OT:14 (8%) | OT:7 (6%) | OT:8 (5%) | |
| Mean PANSS positive (SD)c | 16.2 (5.5) | 17.2 (5.4) | 18.6 (4.9) | 13.3 (4.8) |
| Mean PANSS negative (SD)c | 14.9 (5.3) | 16.8 (5.8) | 15.4 (4.5) | 12.3 (4.1) |
| Mean PANSS general (SD)c | 32.2 (9.0) | 32.8 (9.1) | 35.0 (8.7) | 29.5 (8.4) |
| Mean PANSS total (SD)c | 63.3 (16.9) | 66.7 (16.9) | 69.1 (15.4) | 55.1 (14.7) |
| Mean intracranial volume (SD)c | 1437 cc (186 cc) | 1467 cc (197 cc) | 1396 cc (177 cc) | 1434 cc (174 cc) |
| Mean duration of illness (SD)c | 18.6 y (12.3 y) | 16.4 y (11.8 y) | 19.9 y (11.7 y) | 20.1 y (12.9 y) |
| Mean years of education (SD)c | 13.4 y (2.4 y) | 12.8 y (2.3 y) | 13.2 y (2.2 y) | 14.3 y (2.4 y) |
| Mean Hollingshead Score (SD)c,d | 48.2 (15.7) | 53.2 (14.6) | 48.7 (14.6) | 42.1 (15.7) |
| Antipsychotic status (%)a,e | Yes: 85%; No: 15% | Yes: 92%; No: 8% | Yes: 86%; No: 14% | Yes: 75%; No: 25% |
Note: F, female; M, male.
aSignificantly different across diagnostic groups by chi-squared test.
bAA, African American; CA, Caucasian American; OT, Other.
cSignificantly different across diagnostic groups by Kruskal-Wallis test.
dHollingshead occupation score multiplied by 7, added to Hollingshead education score multiplied by 4; higher score indicates lower social class.
eCurrently taking antipsychotics (yes or no).