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