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The nine-item Patient Health Questionnaire (PHQ-9) is a depressive symptom scale and diagnostic tool introduced in 2001 to screen adult patients in primary care settings. The instrument assesses for the presence and severity of depressive symptoms and a possible depressive disorder.
The Patient Health Questionnaire 2 item (PHQ-2) is an ultra-brief screening instrument containing the first two questions from the PHQ-9. [ 8 ] : 3 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 ...
The Patient Health Questionnaire-2 (PHQ-2) is a shorter version of the PHQ-9 with two screening questions to assess the presence of a depressed mood and a loss of interest or pleasure in routine activities; a positive response to either question indicates further testing is required. [10]
The following diagnostic systems and rating scales are used in psychiatry and clinical psychology.This list is by no means exhaustive or complete. For instance, in the category of depression, there are over two dozen depression rating scales that have been developed in the past eighty years.
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Measures of depression include, but are not limited to: Beck Depression Inventory-11 and the 9-item depression scale in the Patient Health Questionnaire (PHQ-9). [55] Both of these measures are psychological tests that ask personal questions of the participant, and have mostly been used to measure the severity of depression.
The patient is rated by a clinician on 17 to 29 items (depending on version) scored either on a 3-point or 5-point Likert-type scale. For the 17-item version, a score of 0–7 is considered to be normal while a score of 20 or higher (indicating at least moderate severity) is usually required for entry into a clinical trial. [11]
[1] [2] Others include the Beck Depression Inventory, the CORE-OM, Generalized Anxiety Disorder 7 (GAD-7) and the Patient Health Questionnaire (PHQ-9), amongst others. [3] By comparing scores before, during and after completion of talking therapy, the measure enables calculation of a change score.