Clinical cut-off scores for the Borderline Personality Features Scale for Children to differentiate among adolescents with Borderline Personality Disorder, other psychopathology, and no psychopathology: a replication study.

Background: Despite being one of the most popular measures of borderline pathology in adolescents, only one study has evaluated clinical cut-off scores for the Borderline Personality Features Scale for Children (BPFS-C) using a small sample without a healthy comparison group (Chang B, Sharp C, Ha C. The Criterion Validity of the Borderline Personality Features Scale for Children in an Adolescent Inpatient Setting. J Personal Disord. 2011;25(4):492-503. https://doi.org/10.1521/pedi.2011.25.4.492 .). The purpose of the current study was to replicate and improve on the limitations of the prior study conducted by Chang et al. to more definitively establish clinical cut-off scores for the self- and parent-report versions of the BPFS-C to detect clinical and sub-clinical borderline personality disorder (BPD) in a large sample of adolescents with BPD, other psychopathology, and no psychopathology.

Methods: A total of 900 adolescents ranging from ages 12-17 participated in this study. The clinical sample consisted of 622 adolescents recruited from an inpatient psychiatric facility, and the healthy control sample consisted of 278 adolescents recruited from the community. All participants completed the BPFS-C and were administered the Child Interview for DSM-IV Borderline Personality Disorder (CI-BPD).

Results: Using three-way ROC analyses, cut-off scores on the self- and parent-report versions of the BPFS-C distinguishing adolescents with BPD from those with subclinical BPD, and those with subclinical BPD from healthy adolescents were established.

Conclusions: These findings support the use of both versions of the BPFS-C to detect adolescents with BPD and sub-clinical BPD.