Personality dimensions in schizophrenia: A family study

Area of Science:

• Psychiatry
• Clinical Psychology
• Behavioral Genetics

Background:

• Personality traits are known to differ in individuals with schizophrenia and their family members.
• These differences suggest a potential familial risk component for schizophrenia.
• Understanding these traits is crucial for comprehending the broader phenotype of schizophrenia.

Purpose of the Study:

• To investigate personality trait differences in schizophrenia patients, their non-psychotic relatives, and community controls.
• To examine the relationship between personality traits and clinical symptoms and social functioning in schizophrenia patients.

Main Methods:

• Utilized the Dimensional Assessment of Personality Pathology-Basic Questionnaire (DAPP-BQ) for assessment.
• Compared personality profiles across three groups: schizophrenia patients (n=32), adult non-psychotic relatives (n=28), and community controls (n=27).

Main Results:

• Schizophrenia patients showed significant differences across numerous DAPP-BQ dimensions compared to controls and/or relatives.
• These dimensions included affective lability, anxiousness, callousness, conduct problems, cognitive dysregulation, identity issues, intimacy difficulties, insecure attachment, low affiliation, narcissism, oppositionality, restricted expression, self-harm, submissiveness, and suspiciousness.
• No significant personality differences were observed between relatives and controls.

Conclusions:

• Personality traits in schizophrenia patients differ significantly from those in controls and relatives.
• Personality traits are associated with general symptoms and social functioning in schizophrenia.
• Personality traits can be considered an extended phenotype in the context of schizophrenia.