Validation and Harmonisation of Patient Health Questionnaire-9 (PHQ-9)

Validation and Harmonisation of Patient Health Questionnaire-9 (PHQ-9)

The Patient Health Questionnaire-9 (PHQ-9) is a self-report questionnaire used to measure the severity of depression symptoms. It consists of 9 items, each corresponding to one of the DSM-IV diagnostic criteria for major depressive disorder. The possible range of scores for the PHQ-9 is 0-27, with higher values indicating more severe depression symptoms.

Harmony is an AI tool which uses Large Language Models to automatically match items from different questionnaires, even across different languages. You can try Harmony here: https://harmonydata.ac.uk/app. Harmony is also available as a Python and R package.

You may also be interested in Harmony Meta, our new discovery engine that helps you search through vast catalogues of study metadata to identify the variables you need for your research.

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