Two-year stability of borderline personality measures

Area of Science:

• Psychiatry
• Psychological assessment
• Personality disorders

Background:

• Borderline personality disorder (BPD) is a complex mental health condition.
• Understanding the stability of BPD features is crucial for diagnosis and treatment.
• Previous research has yielded mixed results regarding the long-term stability of BPD symptoms.

Purpose of the Study:

• To compute two-year stability coefficients for various measures of borderline personality disorder.
• To investigate the stability of BPD features in a nonclinical sample with significant borderline traits.
• To compare the stability of self-report measures versus interview-based assessments for BPD.

Main Methods:

• A nonclinical sample of 65 individuals with significant borderline features was recruited.
• Two-year stability coefficients were calculated for multiple BPD assessment tools.
• Moderator effects, including changes in personal distress and negative affectivity, were analyzed.

Main Results:

• Overall stability coefficients for BPD measures were modest, ranging from .26 to .62.
• Self-report measures demonstrated higher stability than the interview-based measure.
• Changes in BPD self-report scores correlated with changes in negative affectivity, but not personal distress.

Conclusions:

• Borderline personality disorder features exhibit modest two-year stability in a nonclinical population.
• Self-report instruments appear more stable over time than interview-based assessments for BPD.
• Negative affectivity may be a relevant factor influencing the stability of self-reported BPD symptoms.