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Patient Global Impression of Change Scale
Available in the public domain: Patient Global Impression of Change
Exploratory: Headache
Short Description of Instrument
The Patient Global Impression of Change (PGIC) is a single-item measure of global improvement with treatment on which participants use a seven-point scale ("1=very much improved" to "7=very much worse").
The PGIC is used to provide a score which will inform the discussion by the provider with the patient about their progress and overall change in their symptoms.
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Document last updated April 2020
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