Table 1.
Demographic and clinical characteristics based on diagnosis, mean (SD) unless otherwise noted.
| BD | SZ | Statistics | |
|---|---|---|---|
| n = 104 | n = 56 | ||
| Diagnosis, n | – | ||
| ⬛Schizophrenia | – | 27 | |
| ⬛Schizoaffective disorder | – | 29 | |
| ⬛Bipolar I disorder | 89 | – | |
| ⬛⬛n (%) with psychosis history | 51 (57.3) | – | |
| ⬛Bipolar II disorder | 15 | – | |
| ⬛⬛n (%) with psychosis history | 5 (33.3) | – | |
| Age | 46.95 (11.35) | 48.75 (11.95) | t(158) = −0.938, p = 0.350 |
| Sex, n (%) | X2(1) = 6.291, p = 0.017 | ||
| ⬛Male | 57 (54.8) | 42 (75.0) | |
| ⬛Female | 47 (45.2) | 14 (25.0) | |
| Race, n (%) | X2(1) = 3.357, p = 0.082 | ||
| ⬛Caucasian | 41 (39.4) | 14 (25.0) | |
| ⬛Non Caucasian | 63 (60.6) | 42 (75.0) | |
| Ethnicity | X2(1) = 0.069, p = 0.832 | ||
| ⬛Hispanic | 83 (81.4) | 43 (79.6) | |
| ⬛Non Hispanic | 19 (18.6) | 11 (20.4) | |
| WRAT-3, standard score | 100.49 (14.89) | 99.87 (12.24) | t(158) = 0.265, p = 0.792 |
| Education, years | 14.63 (2.53) | 13.34 (1.93) | t(158) = 3.315, p = 0.001 |
| Handedness, n (%) | X2(1) = 0.391, p = 0.631 | ||
| ⬛Left | 13 (12.5) | 9 (16.1) | |
| ⬛Right | 91 (87.5) | 47 (83.9) | |
| Age of onset, years | 26.3 (7.59) | 25.39 (6.55) | t(158) = 0.753, p = 0.452 |
| BPRS | 22.61 (4.78) | 25.53 (5.45) | t(154) = −3.441, p = 0.001 |
| SANS total composite score | 5.71 (8.10) | 13.08 (9.85) | t(154) = −4.992, p < 0.001 |
| HAMD | 7.37 (6.28) | 8.41 (6.04) | t(158) = −1.018, p = 0.310 |
| YMRS | 2.94 (3.46) | 2.21 (3.95) | t(158) = 1.208, p = 0.229 |
SZ = schizophrenia/schizoaffective disorder group; BD = bipolar I and bipolar II disorder group; WRAT-3 = wide range achievement test – 3; BPRS = brief psychiatric rating scale; SANS = scale for the assessment of negative symptoms; HAMD = Hamilton rating scale for depression; YMRS = Young mania rating scale.