Table 1.
Demographic Information for the Combined Sample of 487 Individuals
| Patient (N = 154) | Relatives (N = 128) | Controls (N = 205) | Statistic | P value | |
| Male:Female (% male) | 94:60 (61) | 53:75 (41) | 79:126 (39) | χ2 = 19.65 | <.000 |
| Mean age (SD) | 40.8 (11.4) | 45.5 (13.0) | 38.1 (12.4) | t = −5.18, 95% CI −10.17 to −4.57a | <.001a |
| t = −2.10, 95% CI −5.20 to −1.70b | .036b | ||||
| DSM-IV | Schizophrenia (90) | No psychiatric illness (89) | No psychiatric illness (181) | na | na |
| Schizoaffective disorder (11) | Depression without psychosis (34) | cDepression without psychosis (19) | |||
| Psychotic Bipolar disorder (51) | Anxiety disorder (3) | Anxiety disorder (2) | |||
| Psychosis not otherwise specified (2) | Panic disorder (2) | Anorexia (3) |
Note: DSM-IV, Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition
a
Relatives vs controls.
b
Patients vs controls.
c
Nineteen controls had a lifetime history of depression but were euthymic at the time of testing.