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ギラン・バレー症候群の発症率,性差,好発年齢などの疫学は,古くは北米,英国,アイスランド,ノルウェーで,1980年以降ではカナダ,イタリア,スペイン,スウェーデンから報告されてきた。ギラン・バレー症候群はどの国においても,あらゆる年齢層にみられ,男性に多く,高齢になるほど頻度が増す。年間発症率は人口10万人当たり0.62〜2.66人,男女比は1.78:1である。日本では発症年齢が比較的若く,フィッシャー症候群が他国より多い。
Abstract
The epidemiologic features of the Guillain-Barré syndrome (GBS) have been reported from North America, England, Iceland, and Norway before 1979. The population incidence rates of GBS fulfilling the NINCDS (National Institute of Neurological and Communicative Disorders and Stroke) criteria in USA, Canada, Italy, Spain, and Sweden ranged from 0.62 cases to 2.66 cases per 100,000 person-years across all age groups, with a relative risk of 1.78 for males. GBS incidence increased by 20% for every 10-year increase in age. In Japan, the incidence of GBS was 1.15 per 100,000 person-years. Males were affected 1.5 times more frequently than females. The average age of patients with GBS was 39.1 ± 20.0 years, which is lesser than that in North America and Europe. The relative ratio of the occurrence of Fisher syndrome among patients with GBS was higher than that in other Asian countries.
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