DSM-5 Alternative Model of Personality Disorder Dysfunctional Personality Traits as Predictors of Self-Reported Aggression in an Italian Sample of Consecutively Admitted, Personality-Disordered Psychotherapy Patients

In order to assess the relationships between DSM-5 Alternative Model of Personality Disorder (AMPD) maladaptive personality traits and self-reports of aggression, 508 Italian adult participants who met at least one DSM-IV Axis II/DSM-5 Section II personality disorder (PD) diagnosis were administered the Personality Inventory for DSM-5 (PID-5) and the Aggression Questionnaire (AQ). Analysis results showed that multiple regression results, PID-5 Hostility, Callousness, and Risk Taking trait scale scores explained a large amount of variance in AQ Physical Aggression (PA) scores. Moreover, PID-5 Hostility, Callousness, and Risk Taking explained more than 20% of the variance in the AQ Physical Aggression scale scores that was left unexplained by selected continuously scored DSM-IV Axis II/DSM-5 Section II PDs, whereas SCID-II Paranoid, Narcissistic, Borderline, and Antisocial PDs added only 4% of variance to the amount of variance in AQ Physical Aggression scores that was already explained by the PID-5 trait scale scores.