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Trigger thumb is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Trigger thumb, or a subtype of Trigger thumb, affects less than 200,000 people in the US population.
The term 'prevalence' of Trigger thumb usually refers to the estimated population
of people who are managing Trigger thumb at any given time.
The term 'incidence' of Trigger thumb refers to the annual diagnosis rate,
or the number of new cases of Trigger thumb 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.
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