Overview
Persistent depressive disorder (PDD), formerly known as dysthymia or dysthymic disorder, is mild or moderate depression that doesn’t go away. If you have persistent depressive disorder, you may experience low mood, as well as other symptoms, occurring most days without going away.
How common is persistent depressive disorder?
Researchers estimate that 1.5% of U.S. adults had persistent depressive disorder in the past year. They estimate that 2.5% of U.S. adults have experienced persistent depressive disorder at some time in their lives.
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