The Mclean screening instrument for borderline personality disorder (MSI-BPD)

The MSI-BPD, developed by Bernstein et al. (17), assesses participants’ BPD traits. The scale, derived from the diagnostic criteria for BPD in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV), contains 10 items. In this study, we used the scale not for BPD diagnosis but to investigate potential relationships between BPD symptoms and other variables. We followed other studies (Crow and Levy, 2019) (18) and used five points as the cutoff value for distinguishing high and low BPD symptom groups. The scale demonstrates good sensitivity (0.81) and specificity (0.85), particularly among younger subjects (adolescents and young adults with a history of childhood maltreatment).