Abstract
Ferrante et al. (2012) report on the epidemiology of migraine in a non-clinical sample of adults living in Parma, Italy (1). A face-to-face interview of each of the 904 participants was conducted by a headache specialist using a validated questionnaire followed by a neurological examination. Migraine, including chronic migraine and migraine with aura, was diagnosed in accordance with the International Classification of Headache Disorders, 2nd edition (ICHD-2) criteria (2). They found an age-adjusted, past-year prevalence of migraine of 24.7% (13% for men and 32.9% for women) (1). In the worldwide review by Stovner et al. (3), looking only at the 14 European studies, ICHD-1 migraine (4) was prevalent in about 15% of adults (range 10–25%), thus suggesting that migraine is almost twice as prevalent in Parma compared to these earlier studies. Factors that may affect migraine prevalence include
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