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Diseases » Down Syndrome » Prevalence

Prevalence and Incidence of Down Syndrome

Ophanet, who are a consortium of European partners, currently defines a condition rare when if affects 1 person per 2,000. They list Down Syndrome as a "rare disease". More information about Down Syndrome is available from Orphanet

Incidence (annual) of Down Syndrome:

1-in-800 overall births ... see also overview of Down Syndrome.

Incidence Rate:

approx 1 in 800 or 0.12% or 340,000 people in USA [Source statistic for calcuation: "1-in-800 overall births" -- see also general information about data sources]

Incidence extrapolations for USA for Down Syndrome:

340,000 per year, 28,333 per month, 6,538 per week, 931 per day, 38 per hour, 0 per minute, 0 per second. [Source statistic for calculation: "1-in-800 overall births" -- see also general information about data sources]

Incidence statistics for Down Syndrome:

The following statistics relate to the incidence of Down Syndrome:

  • Incidence risk of Down syndrome increases with mother's age
  • Less than 1-in-1,000 risk of Down syndrome for women under 30
  • About 1-in-25 risk of Down syndrome for a 45-year-old mother
  • 40 infants were born alive with Down Syndrome in the UK 2002 (University of Ulster, 2003)
  • 4 fetal deaths or still births occurred due to Down Syndrome in the UK 2002 (University of Ulster, 2003)
  • 26 cases of induced abortions occurred following prenatal diagnosis of Down Syndrome in the UK 2002 (University of Ulster, 2003)
  • more statistics...»

More Statistics about Down Syndrome:

  • Hospitalization statistics
  • Survival rate statistics
  • All statistics for Down Syndrome

    About prevalence and incidence statistics:

    The term 'prevalence' of Down Syndrome usually refers to the estimated population of people who are managing Down Syndrome at any given time. The term 'incidence' of Down Syndrome refers to the annual diagnosis rate, or the number of new cases of Down 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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