An individual has just received a diagnosis of paranoid personality disorder. That individual is MOST likely to have a parent or sibling who has:

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Research has shown that individuals with paranoid personality disorder are more likely to have a first-degree relative with schizophrenia, suggesting a genetic vulnerability to psychotic disorders. Bipolar disorder, paraphilias, and alcoholism have not been found to have as strong of a connection to paranoid personality disorder.

An Individual Has Just Received a Diagnosis of Paranoid Personality