Table 1.
Demographic and clinical characteristics of the 81 study participants
| Characteristic | Group; mean (SD)* |
Statistics |
|||
|---|---|---|---|---|---|
| Ultra hih-risk, n = 29 |
First-episode schizophrenia, n = 23 |
Control, n = 29 |
Test | p value | |
| Age, yr | 25.3 (4.3) | 26.4 (6.1) | 25.7 (5.2) | F2,78 = 0.3 | 0.92 |
| Sex, male:female | 19:10 | 16:7 | 17:12 | χ2 = 0.70 | 0.87 |
| Handedness: right, left, mixed or unknown | 24, 2, 3 | 13, 5, 5 | 23, 5, 1 | χ2 = 7.33 | 0.23 |
| Short-duration antipsychotic medication, yes:no | 11:18 | 6:17 | — | χ2 = 3.42 | 0.57 |
| PANSS positive | 11.9 (3.4) | 19.3 (5.1) | t50 = −6.17 | < 0.001 | |
| PANSS negative | 13.6 (5.2) | 18.0 (5.1) | t50 = −3.08 | 0.003 | |
| Whole-brain volume, cm3 | 1259 (146) | 1214 (107) | 1262 (99) | F2,78 = 1.22 | 0.75 |
NS = not significant; PANSS = Positive and Negative Syndrome Scale;25 SD = standard deviation.
*
Unless otherwise indicated.