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Validated questionnaire
Depression
The PHQ-9 is a widely validated depression screening questionnaire used in primary care settings around the world.
9 questions2–4 minPublic domain
Sources & method
Patient Health Questionnaire-9 (PHQ-9). The PHQ was developed by Spitzer, Kroenke and Williams; free to reproduce, no permission required.
- 9 items covering DSM-5 depressive symptoms
- Score from 0 to 27 with severity bands
- Public domain (Pfizer / Spitzer, Kroenke, Williams)
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