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Study supports alternative model for personality disorders in upcoming DSM-5
Date:5/10/2013

that are related to level of impairment in a meaningful way

Although the proposal was endorsed by the DSM-5 Task Force, it was decided that the hybrid model required more research support before being fully adopted. Therefore, the hybrid model will be referred to as an "alternative model" and placed in Section III of the DSM-5, which contains concepts for which further research is needed. Meanwhile, the main body of the DSM-5 will retain the DSM-IV criteria for personality disorders.

A key concern was whether the new model would lead to discrepancies between DSM-IV and DSM-5 definitions of the same disorderespecially for diagnoses such as borderline, antisocial, and schizotypal personality disorders for which a substantial body of research literature exists. "It is important to evaluate whether thresholds can be established that provide solid continuity between DSM-IV and proposed DSM-5 definitions," Drs Morey and Skodol write.

Their study included a national sample of 337 patients, who were diagnosed under both systems by clinicians familiar with their cases. The results showed appreciable correspondence between the DSM-IV diagnosis of personality disorders and the hybrid categorical-dimensional diagnostic model proposed for DSM-5. The two models agreed well for various subtypes, including borderline, avoidant, obsessive-compulsive, antisocial, narcissistic, and schizotypal personality disorders.

"[T]raditional DSM-IV categories of personality disorder can be rendered in terms of core impairments in personality functioning and pathological personality traits with high fidelity," Drs Morey and Skodol conclude. They believe their findings "should allay fears that translating PDs into personality functioning and trait terms will be disruptive to clinical practice or research."

The researchers add, "[T]he definition of all personality disorders in terms of core impairments in personality functioning and pat
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Contact: Connie Hughes
connie.hughes@wolterskluwer.com
646-674-6348
Wolters Kluwer Health
Source:Eurekalert

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