An empirical comparison of three different borderline concepts

Area of Science:

• Psychiatry
• Clinical Psychology
• Personality Disorders

Background:

• Borderline personality disorder (BPD) diagnosis presents challenges.
• Existing diagnostic criteria and conceptualizations require validation.
• Understanding personality organization is crucial for accurate diagnosis.

Purpose of the Study:

• To evaluate the diagnostic utility of the Diagnostic Interview for Borderlines (DIB).
• To compare DIB with DSM-III criteria and Kernberg's concept of borderline personality organization.
• To describe discriminant features, demographics, and treatment history of BPD patients.

Main Methods:

• Forty-six inpatients were independently diagnosed using DSM-III, DIB, and borderline personality organization.
• Diagnostic interviews were videotaped for reliability assessment.
• Structural interviews were scored, and DIB demonstrated high sensitivity and specificity.

Main Results:

• The DIB showed satisfactory inter-rater reliability and high accuracy in diagnosing BPD.
• Borderline personality organization was a broad concept, with only 50% meeting BPD syndrome diagnosis.
• Discriminant features, demographics, and treatment history of BPD patients were detailed.

Conclusions:

• The DIB is a reliable and valid tool for diagnosing borderline personality disorder.
• Borderline personality organization is not a distinct diagnostic entity but a dimensional aspect.
• This dimension represents an intermediate level of personality structure, aiding differential diagnosis.