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Updates on Schizophrenia, Delusional, and Schizoaffective Disorder Criteria in DSM-5

This chapter clarifies and updates the diagnostic criteria for schizophrenia, delusional disorder, and schizoaffective disorder as per DSM-5. Key symptoms of schizophrenia include delusions, hallucinations, disorganized speech, and negative symptoms, with impairment in functioning required for diagnosis. The chapter also outlines changes in criteria for schizoaffective disorder, emphasizing the necessity of major mood episodes. Updates on delusional disorder and schizophreniform disorder criteria are discussed, including the removal of the "non-bizarre" delusion requirement.

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Updates on Schizophrenia, Delusional, and Schizoaffective Disorder Criteria in DSM-5

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  1. Chapter 9: Schizophrenia • Schizophrenia criteria clarified and updated • Delusional, Schizophreniform and Brief Psychotic Disorder criteria clarified • Criteria updated for Schizoaffective Disorder

  2. Schizophrenia • Two or more of the following symptoms for at least 1 month; one symptom should be either 1, 2, or 3: • (1) delusions • (2) hallucinations • (3) disorganized speech • (4) disorganized (catatonic) behavior • (5) negative symptoms (diminished motivation or emotional expression) • Functioning in work, relationships, or self-care has declined since onset • Signs of disorder for at least 6 months; if during a prodromal or residual phase, negative symptoms or two or more of symptoms

  3. Schizoaffective Disorder • The DSM-5 requires either a depressive or manic episode rather than simply mood disorder symptoms, as was done in DSM-IV-TR. • Criteria include • Symptoms of a major mood episode are present for a majority of the duration the illness

  4. Delusional Disorder • DSM-5 removed criterion that the content of the delusions be “non-bizarre”.

  5. Schizophreniform Disorder and Brief Psychotic Disorder • DSM-5 specifies that symptoms must include either hallucinations, delusions, or disorganized speech for each of these diagnoses

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