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Diseases » Trisomy conditions » Incidence

Incidence Statistics for Types of Trisomy conditions

The information below shows a list of types of Trisomy conditions, with information as to the annual incidence of each of these types of Trisomy conditions. Estimates of the people affected each year are calculated based on the available statistics.

Incidence Statistics for Types of Trisomy conditions


Incidence Estimate

US people estimate

Statistic Used for Calculation

Down Syndrome approx 1 in 800 or 0.12% or 340,000 people in USA 340,000 1-in-800 overall births
Edwards Syndrome approx 1 in 3,000 or 0.03% or 90,666 people in USA 90,666 1-in-3000 approximately.
Patau syndrome approx 1 in 5,000 or 0.02% or 54,400 people in USA 54,399 1-in-5000 approximately.
Trisomy 22 N/A N/A No information
Cri-du-chat syndrome N/A N/A No information

Types of Trisomy conditions

For more information about types of Trisomy conditions, refer to our section on types of Trisomy conditions.

About incidence:

The medical term 'incidence' of Trisomy conditions usually refers to the annual diagnosis rate of new cases of Trisomy conditions. Prevalence is a different medical disease measure that refers to the estimated population of people who are managing Trisomy conditions at any given time (e.g. prevalence includes people who have had a medical condition for a long time). For more information on prevalence and incidence statistics, see about prevalence and incidence statistics.


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