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Pfizer Inc, that is used as a screening and diagnostic tool for mental health disorders of depression, anxiety, alcohol, eating, and somatoform disorders. general...

Pfizer Inc, that is used as a screening and diagnostic tool for mental health disorders of depression, anxiety, alcohol, eating, and somatoform disorders. general health questionnaire 28 pdf multi-part questions – the Patient Health Questionnaire was developed and validated.


Though less commonly used, there are also brief versions of the PHQ-9 and GAD-7 that may be useful as screening tools in some settings. Although these tests were originally designed as self-report inventories they can also be administered by trained health care practitioners. The PHQ is available in over 20 languages, available on the PHQ website. Additionally, the measures have been validated in a number of different populations internationally.

Designed for use in the primary care setting, it lacks coverage for disorders seen in psychiatric settings. Some modules are used independently, and variants have been developed based on the original items.

The PHQ-9, a tool specific to depression, scores each of the 9 DSM-IV related criteria based on the mood module from the original PRIME-MD. The PHQ-9 is both sensitive and specific in its diagnoses, which has led to its prominence in the primary care setting. This tool is used in a variety of different contexts, including clinical settings across the United States as well as research studies.

One study which used the PHQ-9, examined if college student displays of depression symptoms on Facebook were representative of offline symptoms. Results demonstrated that those who displayed depression symptoms on Facebook scored higher on the PHQ-9, suggesting that those who display depression symptoms on Facebook are experiencing them offline. Two screening questions to assess the presence of a depressed mood and a loss of interest or pleasure in routine activities, and a positive response to either question indicates further testing is required.

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