Naturalistic study on ICD-10 personality disorders.

Area of Science:

• Psychiatry
• Clinical Psychology

Background:

• Personality disorders (PD) are prevalent in psychiatric populations.
• Understanding the frequency and characteristics of PD subtypes is crucial for effective treatment.

Purpose of the Study:

• To determine the frequency, socio-demographics, and comorbidity of ICD-10 personality disorders in psychiatric inpatients.
• To evaluate the validity of subdividing emotionally unstable PD into impulsive and borderline subtypes.

Main Methods:

• Analysis of routine data from all psychiatric hospitalizations in the Canton of Zurich between 1998 and 2002.
• Comparison of socio-demographic factors and comorbidities between impulsive and borderline PD subtypes.

Main Results:

• Personality disorders were diagnosed in 10.2% of inpatients.
• Emotionally unstable PD accounted for 54.5% of all PD diagnoses.
• Significant differences in sex, age, employment, and comorbidity were found between impulsive and borderline subtypes.

Conclusions:

• Emotionally unstable PD is the most frequent PD in clinical settings.
• The differentiation of emotionally unstable PD into impulsive and borderline subtypes is clinically justified.