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Evidence for the taxonic latent structure for DSM-5 intermittent explosive disorder in adults

Published online by Cambridge University Press:  04 November 2019

Jennifer R. Fanning
Affiliation:
Center for Depression, Anxiety and Stress Research, McLean Hospital, Harvard Medical School, Belmont, MA02478, USA
David K. Marcus
Affiliation:
Department of Psychology, Washington State University, Pullman, WA99164, USA
Jonathan R. Preszler
Affiliation:
Department of Psychology, Washington State University, Pullman, WA99164, USA
Emil F. Coccaro*
Affiliation:
Department of Psychiatry & Behavioral Neuroscience, University of Chicago, Chicago, IL60637, USA
*
Author for correspondence: Emil F. Coccaro, E-mail: ecoccaro@bsd.uchicago.edu

Abstract

Background

Identification of individuals with clinically significant aggressive behavior is critical for the prevention and management of human aggressive behavior. A previous population-based taxometric study reported that the Diagnostic and Statistical Manual of Mental Disorders-4th Edition (DSM-IV) intermittent explosive disorder (IED) belongs to its own discrete class (taxon) rather than existing along a continuum.

Methods

This study sought to extend previous population-based findings in a clinical research sample of adults with DSM-5 IED (n = 346), adults with non-aggressive DSM-5 disorders (n = 293), and adults without any DSM-5 disorder (n = 174), using standardized assessments of DSM-5 diagnoses, aggression, and other related measures not available in past studies.

Results

Analyses revealed a taxonic latent structure that overlapped with the DSM-5 diagnosis of IED. Within the sample, taxon group members had higher scores on a variety of measures of psychopathology than did the complement members of the sample. Comorbidity of other diagnoses with IED did not affect these results.

Conclusion

These findings support the proposition that DSM-5 IED represents a distinct behavioral disorder rather than the severe end of an aggressive behavior continuum.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 2019

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