Prevalence and Incidence of Noonan Syndrome
Prevalance of Noonan Syndrome:
estimated 1 per 1,000 - 2,500 people are affected by Noonan syndrome, Genetics Home Reference website ... see also overview of Noonan Syndrome.
approx 1 in 1,000 or 0.10% or 272,000 people in USA [Source statistic for calcuation: "estimated 1 per 1,000 - 2,500 people are affected by Noonan syndrome, Genetics Home Reference website" -- see also general information about data sources]
Noonan Syndrome: Rare Disease
Noonan Syndrome is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Noonan Syndrome, or a subtype of Noonan Syndrome,
affects less than 200,000 people in the US population.
Ophanet, who are a consortium of European partners,
currently defines a condition rare when if affects 1 person per 2,000.
They list Noonan Syndrome as a "rare disease".
More information about Noonan Syndrome is available from Orphanet
About prevalence and incidence statistics:
The term 'prevalence' of Noonan Syndrome usually refers to the estimated population
of people who are managing Noonan Syndrome at any given time.
The term 'incidence' of Noonan Syndrome refers to the annual diagnosis rate,
or the number of new cases of Noonan 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.