Prevalence and Incidence of Stargardt Disease
Stargardt Disease: Rare Disease
Stargardt Disease is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Stargardt Disease, or a subtype of Stargardt Disease,
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 Stargardt Disease as a "rare disease".
More information about Stargardt Disease is available from Orphanet
About prevalence and incidence statistics:
The term 'prevalence' of Stargardt Disease usually refers to the estimated population
of people who are managing Stargardt Disease at any given time.
The term 'incidence' of Stargardt Disease refers to the annual diagnosis rate,
or the number of new cases of Stargardt Disease 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.