Table 1.
Demographic characteristics and bipolar disorder
| Cases (N=85) | Controls (N=170) | ||||
|---|---|---|---|---|---|
|
| |||||
| Mean | SD | Mean | SD | P | |
| Maternal Age (yrs)1 | 27.5 | 6.6 | 28.2 | 6.0 | 0.37 |
| Gestational Age (days)1 | 281.4 | 16.3 | 280.5 | 16.5 | 0.68 |
|
| |||||
| N | % | N | % | P | |
|
| |||||
| Maternal Race1 | 0.20 | ||||
| White | 58 | 69.0 | 109 | 64.1 | |
| Black | 22 | 26.2 | 41 | 24.1 | |
| Other | 4 | 4.8 | 20 | 11.8 | |
| Maternal Education2 | 0.64 | ||||
| Less than high school | 16 | 20.2 | 26 | 16.1 | |
| High school graduate | 30 | 38.0 | 59 | 36.7 | |
| Some college/college graduate | 33 | 41.8 | 76 | 47.2 | |
| Maternal Psychiatric Historya, 3 | 0.33 | ||||
| Yes | 22 | 26.2 | 35 | 20.7 | |
| No | 62 | 73.8 | 134 | 79.3 | |
a
Maternal psychiatric disorder was defined as psychoses, schizophrenia, affective disorder, anxiety, alcohol/substance abuse, mental deficiency, and other mental disorders
1
Missing for 1 case
2
Missing for 6 cases, 9 controls
3
Missing for 1 case, 1 control