The PHQ-9 is a validated, 9-question tool to assess for the degree of depression present in an individual.
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Little interest or pleasure in doing things?
Feeling down, depressed, or hopeless?
Trouble falling or staying asleep, or sleeping too much?
Feeling tired or having little energy?
Poor appetite or overeating?
Feeling bad about yourself — or that you are a failure or have let yourself or your family down?
Trouble concentrating on things, such as reading the newspaper or watching television?
Moving or speaking so slowly that other people could have noticed? Or so fidgety or restless that you have been moving a lot more than usual?
Thoughts that you would be better off dead, or thoughts of hurting yourself in some way?
How difficult have these problems made it to do work, take care of things at home, or get along with other people?