Table 1.
Sample Demographics and Clinical Characteristics
| Schizophrenia Patients (n=127) | Healthy Volunteers (n=136) | Statistic | p-value | |
|---|---|---|---|---|
| Mean Age (SD) | 39.1 (11.2) | 38.6 (11.4) | t261=0.35 | 0.73 |
| Sex (Male/Female) | 106/21 | 98/38 | χ21=4.91 | 0.03 |
| Handednessa (bilateral/left/right) | 3/10/114 | 2/6/128 | FET | 0.46 |
| Subject Educationb (SD) | 4.6 (1.0) | 5.8 (0.9) | t261=11.46 | <0.0001 |
| Parental Educationb (SD) | 5.7 (1.8) | 5.8 (1.5) | t261=0.20 | 0.66 |
| Race | FET | 0.31 | ||
| American Indian or Alaskan Native | 2 | 2 | ||
| Asian | 18 | 10 | ||
| Black or African American | 20 | 17 | ||
| Native Hawaiian or Pacific Islander | 1 | 1 | ||
| White | 86 | 106 | ||
| NAART | 29.3 (12.8) | 40.7 (11.4) | t258= −7.55 | <0.0001 |
| Age at Onset | 21.5 (6.6) | |||
| Duration of Illness | 17.7 (11.2) | |||
| PANSS positive | 15.4 (5.0) | |||
| PANSS negative | 14.6 (5.5) | |||
| PANSS general | 28.5 (7.5) | |||
| PANSS composite | 0.8 (6.4) |
FET=Fisher’s Exact Test; NAART=North American Adult Reading Test; PANSS=Positive and Negative Syndrome Scale;
a
Based on the Edinburgh Handedness Inventory;
b
Based on the Hollingstead Socioeconomic Status Scale.