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Patient Health Questionnaire 9 (PHQ-9)

Psychiatric Scale | October 30, 2017

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The Patient Health Questionnaire 9 is a self-administered 9-item scale for assessing and monitoring depression severity. It is derived from the depression questions within the full Patient Health Questionnaire (PHQ). The PHQ family of measures, including abbreviated and alternative versions as well as the GAD-7, were developed by Drs. Robert L. Spitzer, Janet B. W….

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