• Zaza Katsarava, Dawn C Buse, Aubrey N Manack, and Richard B Lipton.
• Department of Neurology, University of Essen, Hufelandstrasse 55, 45122 Essen, Germany. Zaza.Katsarava@uk-essen.de
• Curr Pain Headache Rep. 2012 Feb 1; 16 (1): 869286-92.

AbstractChronic migraine (CM) and episodic migraine (EM) are part of the spectrum of migraine disorders, but they are distinct clinical entities. Population-based studies have shown that those with CM demonstrate higher individual and societal burden because they are significantly more disabled than those with EM and have greater impaired quality of life both inside and outside the home. Proper diagnosis of both conditions requires clearly defined clinical criteria. Diagnosis enables the initiation of appropriate treatments and risk-factor modification, which ultimately improve functional status and quality of life for persons with migraine. Recognizing that both disorders are on the spectrum of migraine, this review serves as a guide to define the disease state of CM as distinct from EM in terms of clinical, epidemiological, sociodemographic, and comorbidity profiles.

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