Mutually Exclusive versus Co-Occurring Diagnostic Categories: The Challenge of Diagnostic Comorbidity

  title={Mutually Exclusive versus Co-Occurring Diagnostic Categories: The Challenge of Diagnostic Comorbidity},
  author={Michael First},
  pages={206 - 210}
  • M. First
  • Published 1 August 2005
  • Psychology, Medicine
  • Psychopathology
Diagnostic comorbidity is the rule rather than the exception in both DSM-IV and ICD-10. Three types of comorbidity include true comorbidity (clinically distinct entities), artifactual comorbidity (a byproduct of the DSM/ICD strategy to split categorical diagnoses) and spurious comorbidity. DSM has established ‘mutually exclusive’ relationships between disorders to reduce such spurious comorbidity. Four types of mutually exclusive relationships are identified: (1) between disorders that are on… Expand
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