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Persistent Depressive Disorder

Persistent depressive disorder is a subcategory of depressive disorders that was first introduced in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), and subsumes different forms of chronic depressive disorders. Chronic depression is a term that is used for forms of depressive disorders that vary according to symptom severity but share a long persistence of symptoms over time. According to both the DSM and the International Classification of Diseases (ICD), various forms of chronic depression are characterized by depressive symptoms that persist for more than 2 years. Until recently, diagnostic classification systems handled different types of chronic depression as fairly distinct categories; but due to an inability to find scientifically meaningful differences among them, the developers of the DSM-5 created a ...

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