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Front Psychiatry. 2021 Mar 31;12:634332. doi: 10.3389/fpsyt.2021.634332. eCollection 2021.

Personality Functioning and Mentalizing in Patients With Subthreshold or Diagnosed Borderline Personality Disorder: Implications for ICD-11.

Frontiers in psychiatry

Marie Zerafine Rishede, Sophie Juul, Sune Bo, Matthias Gondan, Stine Bjerrum Møeller, Sebastian Simonsen

Affiliations

  1. Stolpegaard Psychotherapy Centre, Mental Health Services in the Capital Region of Denmark, Gentofte, Denmark.
  2. Department of Psychology, University of Copenhagen, Copenhagen, Denmark.
  3. Psychiatric Research Unit, Slagelse, Denmark.

PMID: 33868051 PMCID: PMC8044580 DOI: 10.3389/fpsyt.2021.634332

Abstract

The 11th revision of the International Classification of Diseases for Mortality and Morbidity Statistics (ICD-11) defines personality disorder according to personality functioning, which relates to self- and interpersonal functioning. The aim of the present study was to assess the relationship between mentalizing and personality functioning in patients with subthreshold or diagnosed borderline personality disorder. A total of 116 eligible participants were included. Mentalizing was assessed using the Mentalization Questionnaire (MZQ), personality functioning (self- and interpersonal functioning) was assessed using the Level of Personality Functioning Scale-Brief Form 2.0 (LPFS-BF), and borderline severity was assessed using the Zanarini Rating Scale (ZAN-BPD). Mediation analysis was employed to test if mentalizing accounted for the relationship between borderline severity and self- and interpersonal functioning. We found a significant relationship between borderline severity and both subscales of the LPFS-BF. Mentalizing fully and significantly mediated the relationship between borderline severity and interpersonal functioning. However, mentalizing only partly mediated the relationship between borderline severity and self-functioning. Controlling for the covariates gender and age did not impact the results. Mentalizing is likely to be involved in the ICD-11 model of personality functioning, especially interpersonal functioning. This could emphasize the relevance of therapy aimed at strengthening mentalizing abilities when treating personality pathology in general and people with borderline personality disorder in particular. However, self-functioning may be more nuanced, as aspects other than mentalizing also influence self-functioning. The study is explorative in nature and has methodological limitations that require caution in the interpretation and generalizability.

Copyright © 2021 Rishede, Juul, Bo, Gondan, Bjerrum Møeller and Simonsen.

Keywords: borderline personality disorder; international classification of diseases 11th revision; interpersonal functioning; mediation; mentalizing; personality disorder; personality functioning; self-functioning

Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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