Prevalence and Incidence of Romano-Ward syndrome
Prevalance of Romano-Ward syndrome:
estimated 1 per 7,000 people suffer from Romano-Ward syndrome worldwide, Genetics Home Reference website ... see also overview of Romano-Ward syndrome.
approx 1 in 7,000 or 0.01% or 38,857 people in USA [Source statistic for calcuation: "estimated 1 per 7,000 people suffer from Romano-Ward syndrome worldwide, Genetics Home Reference website" -- see also general information about data sources]
Ophanet, who are a consortium of European partners,
currently defines a condition rare when if affects 1 person per 2,000.
They list Romano-Ward syndrome as a "rare disease".
More information about Romano-Ward syndrome is available from Orphanet
About prevalence and incidence statistics:
The term 'prevalence' of Romano-Ward syndrome usually refers to the estimated population
of people who are managing Romano-Ward syndrome at any given time.
The term 'incidence' of Romano-Ward syndrome refers to the annual diagnosis rate,
or the number of new cases of Romano-Ward 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.