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Differences in age of onset between women and men. Total 400 patients, ages ranged from 22 to 91 years, the proportion of men was significantly higher in the 20 to 39, 40 to 49 age groups compared with that of women (P < 0.05), and the proportion of women with AAD was slightly increased after 60 years of age. AAD = acute aortic dissection.
