Table 1. Demographics and Clinical Characteristics of the Sample.
| Bipolar (N=68) | Schizophrenia (N=38) | Controls (N=36) | ||
|---|---|---|---|---|
| Age (years) | 44.0 (10.6) | 44.7 (9.2) | 41.4 (10) | F(2, 139)=1.12, P=0.33 |
| Gender (% male) | 54.4 | 55.3 | 55.6 | X2=0.01, P=0.99 |
| Race (n) White | 50 | 17 | 16 | |
| Black | 12 | 11 | 11 | |
| Other | 6 | 11 | 9 | |
| Parental education | 14.7 (3.1) | 13.7 (3.4) | 14.8 (3.4) | F(2, 139)=1.4, P=0.25 |
| Age of onset | 18.3 (6.7) | 20.2 (5.2) | – | F(1, 102)=1.91, P=0.17 |
| BPRS total | 33.4 (7.0) | 41.3 (8.7) | – | F(1, 102)=25.3, P<0.01 |
| BPRS positive symptoms | 1.1 (0.2) | 2.1 (0.9) | – | F(1, 102)=96.8, P<0.01 |
| BPRS negative symptoms | 3.6 (1.3) | 5.2 (2.6) | – | F(1, 102)=14.3, P<0.01 |
| HAMD | 8.1 (6.4) | 7.4 (5.0) | – | F(1, 102)=0.3, P=0.59 |
| YMRS | 3.4 (3.9) | 5.6 (5.8) | – | F(1, 102)=5.2, P=0.03 |
| MCCB global | 42.4(11.2) | 30.3 (12.2) | 50.0 (9.9) | F(2, 128)=28, P<0.01 |
Abbreviations: BPRS total, brief psychiatric rating scale total score; HAMD, hamilton rating scale for depression; MCCB global, MATRICS consensus cognitive battery global score; YMRS, young mania rating scale