According to the DSM-5, a diagnosis of GAD requires anxiety and worry that are associated with at least three of the following six symptoms, occurring on more days than not, for at least 6 months:
Restlessness or feeling keyed-up or on edge
Being easily fatigued
Difficulty concentrating or mind going blank
For diagnosis, symptoms must result in the patient's impaired ability to function and cannot be attributed to a separate medical condition.
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Cite this: Stephen Soreff. Fast Five Quiz: Anxiety - Medscape - Aug 09, 2021.