The Patient Health Questionnaire 9-item depression module (PHQ-9) is a well-validated, brief, self-reported, diagnostic, and severity measure of depression designed for use in primary care (PC).
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The Link Between Chronic Pain and DepressionThe study found that as PHQ-9 depression severity increased, patients experienced a significant decrease in functional status on all six SF-20 subscales. A PHQ-9 score > or =10 had a sensitivity ...
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