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Patient Global Impression of Change Scale
Availability
Available in the public domain: Patient Global Impression of Change
Classification
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.
References
Bromberg J, Wood ME, Black RA, Surette DA, Zacharoff KL, Chiauzzi EJ. A Randomized Trial of a Web-based Intervention to Improve Migraine Self- Management and Coping. Headache. 2012;52(2):244–261.
 
Cady R, Saper J, Dexter K, Manley HR. A double-blind, placebo-controlled study of repetitive transnasal sphenopalatine ganglion blockade with tx360(®) as acute treatment for chronic migraine. Headache. 2015;55(1):101–116.
 
Dodick DW, Silberstein S, Saper J, Freitag FG, Cady RK, Rapoport AM, Mathew NT, Hulihan J, Crivera C, Rupnow MF, Mao L, Finlayson G, Greenberg SJ. The impact of topiramate on health-related quality of life indicators in chronic migraine. Headache. 2007;47(10):1398–1408.
 
Hurst H, Bolton J. Assessing the clinical significance of change scores recorded on subjective outcome measures. J Manipulative Physiol Ther. 2004;27(1):26–35.
 
Silberstein S, Goode-Sellers S, Twomey C, Saiers J, Ascher J. Randomized, double-blind, placebo-controlled, phase II trial of gabapentin enacarbil for migraine prophylaxis. Cephalalgia. 2013;33(2):101–111.
Recommended Instrument for
Headache
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