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  • Title: Is the appendix a useful appendage? An empirical examination of depressive, passive-aggressive (negativistic), sadistic, and self-defeating personality disorders.
    Author: Bradley R, Shedler J, Westen D.
    Journal: J Pers Disord; 2006 Oct; 20(5):524-40. PubMed ID: 17032163.
    Abstract:
    Decisions about whether to include depressive, passive-aggressive, sadistic, and self-defeating disorders in Axis II have been made difficult by a relative dearth of data. We report the results of a study identifying potential defining features of these diagnoses and assessing their distinctiveness from other Axis II personality disorders (PDs). A national sample of experienced psychiatrists and psychologists used the SWAP-200 to describe a patient with a current axis II disorder or an appendix or deleted PD from DSM-II-R. We examined clinicians' descriptions of patients to identify their most characteristic features, and then applied an empirical clustering procedure, Q-factor analysis, to see whether versions of these disorders would emerge empirically. As currently conceptualized, only passive-aggressive PD was distinct from other PDs. When the data were subjected to Q-factor analysis, the first and largest grouping was a dysphoric (depressive) PD. A hostile-negativistic subcategory emerged that resembled passive-aggressive PD, along with a revised dependent diagnosis that included many self-defeating/masochistic features. The results suggest that a depressive or dysphoric personality may represent an internalizing spectrum of personality pathology, and that a hostile-negativistic PD may be distinct from the disorders in the text of DSM-IV. Sadistic and self-defeating PD do not appear to represent distinct disorders, although they include personality traits (sadism and revictimization) associated with distinct developmental histories.
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