1 in 300 (NIDCD); 1 in 600 (NIAID); 1 in 333 Caucasians. ... see also overview of Selective IgA Deficiency.
approx 1 in 300 or 0.33% or 906,666 people in USA [Source statistic for calcuation: "1 in 300 (NIDCD); 1 in 600 (NIAID); 1 in 333 Caucasians." -- see also general information about data sources]
Selective IgA Deficiency is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Selective IgA Deficiency, or a subtype of Selective IgA Deficiency, 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 Selective IgA Deficiency as a "rare disease". More information about Selective IgA Deficiency is available from Orphanet
Approximately one out of 600 individuals have selective IgA deficiency. (Source: excerpt from Primary Immune Deficiency, NIAID Fact Sheet: NIAID)
The term 'prevalence' of Selective IgA Deficiency usually refers to the estimated population of people who are managing Selective IgA Deficiency at any given time. The term 'incidence' of Selective IgA Deficiency refers to the annual diagnosis rate, or the number of new cases of Selective IgA Deficiency 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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