biostudies-literatureUnknown228(1)Kerber A<h4>Background</h4>Decades of research on the dimensional nature of personality disorder have led to the replacement of categorical personality disorder diagnoses by a dimensional assessment of personality disorder severity (PDS) in ICD-11, which essentially corresponds to personality functioning in the alternative DSM-5 model for personality disorders. Besides advancing the focus in the diagnosis of PD on impairments in self- and interpersonal functioning, this shift also urges clinicians and researchers worldwide to get familiar with new diagnostic approaches.<h4>Aims</h4>This study investigated which PDS dimensions among different assessment methods and conceptualisations have the most predictive value for overall PDS.<h4>Method</h4>Using semi-structured interviews and self-reports of pThe British journal of psychiatry : the journal of mental science46-54https://www.ebi.ac.uk/biostudies/studies/S-EPMC12722010biostudies-literatureDetermining essential dimensions for the clinical approximation of personality disorder severity: multi-method study.PMC12722010Macina CBusch OKnaevelsrud CKerber AWrege JKampe LOhse LRentrop MHorz-Sagstetter SfalseDetermining essential dimensions for the clinical approximation of personality disorder severity: multi-method study.<h4>Background</h4>Decades of research on the dimensional nature of personality disorder have led to the replacement of categorical personality disorder diagnoses by a dimensional assessment of personality disorder severity (PDS) in ICD-11, which essentially corresponds to personality functioning in the alternative DSM-5 model for personality disorders. Besides advancing the focus in the diagnosis of PD on impairments in self- and interpersonal functioning, this shift also urges clinicians and researchers worldwide to get familiar with new diagnostic approaches.<h4>Aims</h4>This study investigated which PDS dimensions among different assessment methods and conceptualisations have the most predictive value for overall PDS.<h4>Method</h4>Using semi-structured interviews and self-reports of p2026-01-01T00:00:00Z2026 Jan2026-06-06T04:43:37.343Z2026-05-25T03:12:11.889ZS-EPMC127220104098837510.1192/bjp.2025.10347