Normative data for the LPFS‐BF 2.0 derived from the Danish general population and relationship with psychosocial impairment

摘要

Abstract The Level of Personality Functioning Scale–Brief Form 2.0 is a frequently used self‐report inventory that may be used to screen for self‐ and interpersonal dysfunction according to the DSM‐5 Alternative Model for Personality Disorders (AMPD) and the ICD‐11 Classification of Personality Disorders. Nevertheless, reliable norms and cut‐off scores to aid interpretation and clinical decision making are still lacking. The LPFS‐BF and relevant impairment measures were administered to a sociodemographically stratisfied sample of 2,002 adults from the general Danish population of whom 713 individuals eventually delivered data for inclusion in the present study. The unidimensionality of the LPFS‐BF scores was established using Confirmatory Factor Analysis (CFA). Item‐Response Theory (IRT) analysis indicated satisfactory item functioning for all 12 items and suggested normative observed score thresholds at different latent severity levels. Meaningful associations were found between the LPFS‐BF norm‐based cut‐off scores, quality of life, and social and occupational functioning. This study presented the first normative data for LPFS‐BF, which specifically applies to Denmark but likely also other socioeconomically comparable Nordic and Western societies. These results allow for interpretation of LPFS‐BF scores and clinical decision‐making. Future research should corroborate these findings and compare them to scores obtained in other general population samples.