Psychiatric conditions
- There is a general population risk of 1-2% of developing a form of mental illness such as schizophrenia
and bipolar disorder during a person’s lifetime
- A diagnosis of schizophrenia or bipolar disorder increases the risk for 1° relatives
| Affected relative | Schizophrenia (risk %) |
Bipolar disorder (risk %) |
| No close relative (general population) | 1 |
2-3 |
| Sibling | 9 |
13 |
| Parent | 13 |
15 |
| Sibling and 1 parent | 15 |
20 |
| Both parents | 45 |
50 |
- Genetic testing for schizophrenia or bipolar disorder is not available.