Table 1.
Demographic and obstetric characteristics of the case and control groups by primary diagnosis.
| Characteristic | Schizophrenia | Affective Psychosis | ||
|---|---|---|---|---|
| Cases (N=70) | Controls (N=210) | Cases (N=41) | Controls (N=123) | |
| Female, N (%) | 23 (32.8%) | 69 (32.8%) | 24 (58.5%) | 72 (58.5%) |
| African American | 68 (97.1%) | 204 (97.1%) | 35 (85.4%) | 105 (85.4%) |
| Birth Hypoxia | 22 (31.4%) | 60 (28.6%) | 8 (19.5%) | 31 (25.2%) |
| Maternal Toxemia/SGA | 12 (17.1%) | 52 (24.8%) | 8 (19.5%) | 18 (14.6%) |
| Prematurity | 14 (20.0%) | 37 (17.6%) | 8 (19.5%) | 22 (17.9%) |
| T/C or T/T Val66Met | 3 (7.9%) | 9 (7.8%) | 0 (0.0%) | 5 (8.1%) |
| Birth year, mean (SD) | 1962 (2.1) | 1962 (2.1) | 1962 (2.0) | 1962 (2.0) |
| Mother’s age, yrs | 24.4 (6.6) | 24.5 (6.3) | 24.2 (7.4) | 23.8 (5.9) |
| SES | 2.9 (1.9) | 3.4 (1.9) | 3.3 (1.9) | 3.5 (1.9) |
| Maternal education, yrs completed | 10.4 (2.4) | 10.8 (2.6) | 9.7 (1.9) | 10.7 (3.5) |
| BDNF, infant, pg/ml | 434.2 (128.6) | 432.3 (141.9) | 465.9 (165) | 457.6 (127.3) |
| BDNF, mother, pg/ml | 406.3 (65.5) | 399.8 (65.4) | 392.1 (69.2) | 386.4 (65.6) |
SGA=small for gestational age.