Table 1.
Sample demographic and clinical characteristics.
| Characteristic | Patient n = 21 | Control n = 25 | Statistic | Df | P-value |
|---|---|---|---|---|---|
| Mean (SD) | Mean (SD) | ||||
| Age | 42.2 (10.8) | 41.4 (7.6) | t = 0.28 | 44 | 0.78 |
| Years of education | 13.5 (1.6) | 14.2 (1.9) | t = –1.36 | 44 | 0.18 |
| Average parental education∗ | 13.6 (3.0) | 13.0 (1.9) | t = 0.71 | 39 | 0.49 |
| No. (%) | No. (%) | ||||
| Gender (male/female) | 17/4 | 20/5 | X2 = 0.01 | 1 | 0.94 |
| Ethnicity | X2 = 0.52 | 2 | 0.78 | ||
| Caucasian | 13 (62%) | 13 (52%) | |||
| African American | 7 (33%) | 10 (40%) | |||
| Other | 1 (5%) | 2 (8%) | |||
| Mean (SD) | |||||
| Medication dosage (chlorpromazine equivalent in mg/day) | 337.65 (240.11) | ||||
| BPRS | |||||
| Total score | 46.52 (10.8) | ||||
| Positive symptoms | 2.46 (0.8) | ||||
| Negative symptoms | 1.73 (0.9) | ||||
| SANS | |||||
| Affective flattening | 1.57 (1.5) | ||||
| Alogia | 0.52 (1.0) | ||||
| Avolition | 2.52 (1.2) | ||||
| Anhedonia | 2.62 (1.2) | ||||
∗Data available for 19 patients, 22 controls. SD, standard deviation; No., number; mg, milligrams; BPRS, Brief Psychiatric Rating Scale; SANS, Scale for the Assessment of Negative Symptoms.