Special Article:

Schizoaffective illness

The chance comorbidity of schizophrenia and affective illness?


Introduction

Our understanding of schizoaffective disorder can be organized in five different theories.  One approach holds that schizoaffective disorder is its own illness, separate from others, as appears to be the case superficially by its separate diagnostic criteria in DSM-IV.  A second model holds that schizoaffective disorder represents a middle clinical picture on a psychotic continuum that extends from bipolar disorder to schizophrenia; in other words, this model rejects the Kraepelinian dichotomy of bipolar disorder and schizophrenia.  A third model argues that schizoaffective disorder represents the comorbidity of affective disorders  and schizophrenia, thereby maintaining the Kraepelinian dichotomy and explaining overlap symptoms as chance co-occurrence.  A fourth theory views schizoaffective disorder as basically a variant of bipolar disorder, and a fifth sees schizoaffective disorder as a variant of...

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