DSM-5 Diagnostic Criteria for Major Depressive Disorder

The diagnostic criteria for major depression in the Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5), require the presence of either sadness or anhedonia with a total of five or more symptoms over a 2-week period.

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DSM-IV Diagnostic Criteria for Major Depressive Episode

A. Five (or more) of the following symptoms have been present during the same 2-week period and represent a change from previous functioning; at least one of the symptoms is either (1) depressed mood or (2) loss of interest or pleasure.

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