Individuals with schizotypal personality disorder have odd thoughts, affects, perceptions, and beliefs.
Lifetime prevalence is 3% of the general population.
Studies demonstrate interfamilial aggregation of this disorder, especially among first-degree relatives of schizophrenics.
History and Mental Status Examination
Schizotypal personality disorder is best thought of as similar to schizophrenia but less severe and without sustained psychotic symptoms. People with this disorder have few relationships and demonstrate oddities of thought, affect, perception, and belief Many are highly distrustful and often paranoid, which results in a very constricted social world. The lifetime suicide rate among this population is 10%.
Schizophrenia, delusional disorder, and mood disorder with psychosis are the major differential diagnoses.
Revision date: June 22, 2011
Last revised: by Janet A. Staessen, MD, PhD