Statistics about Klinefelter syndrome


About statistics: This page presents a variety of statistics about Klinefelter syndrome. The term 'prevalence' of Klinefelter syndrome usually refers to the estimated population of people who are managing Klinefelter syndrome at any given time. The term 'incidence' of Klinefelter syndrome refers to the annual diagnosis rate, or the number of new cases of Klinefelter 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.

Prevalence and incidence statistics for Klinefelter syndrome: (see also prevalence and incidence page for Klinefelter syndrome)
  Incidence (annual) of Klinefelter syndrome: 1-in-500 to 1-in-1000 male births (NIDCD)
  Incidence Rate: approx 1 in 500 or 0.20% or 544,000 people in USA [about data]
  Incidence statistics about Klinefelter syndrome: The following statistics relate to the incidence of Klinefelter syndrome:
  • 36 infants were born alive with Klinefelters Syndrome in the UK 2002 (University of Ulster, 2003)
  • 1 fetal deaths or still births occurred due to Klinefelters Syndrome in the UK 2002 (University of Ulster, 2003)
  • 6 cases of induced abortions occurred following prenatal diagnosis of Klinefelters Syndrome in the UK 2002 (University of Ulster, 2003)
  • Klinefelters Syndrome occurred in 14.63 per 10,000 births in the UK 2002 (University of Ulster, 2003)

Last revision: May 30, 2003

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