Are Bipolar and Borderline Personality Disorder Related?
Although it is not yet clear-cut, research has not found a strong relationship between BPD and bipolar disorder. There is some evidence that people with BPD are diagnosed with bipolar disorder at higher rates than individuals with other personality disorders. One study found that about 20% of individuals with BPD are also diagnosed with bipolar disorder, whereas only about 10% of people with with other personality disorders are also diagnosed with bipolar disorder. This could mean there is some relationship between BPD and bipolar, but it could also be attributed to imprecision in diagnosis, or in the individuals making the diagnosis.