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This page presents a variety of statistics about 49,XXXXY syndrome. The term 'prevalence' of 49,XXXXY syndrome usually refers to the estimated population of people who are managing 49,XXXXY syndrome at any given time. The term 'incidence' of 49,XXXXY syndrome refers to the annual diagnosis rate, or the number of new cases of 49,XXXXY syndrome diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.
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