The average percentage increase per year of the incidence and prevalence of autoimmune diseases worldwide were 19% and 13% respectively. 1
Incidence is the rate of new (or newly diagnosed) cases of the disease. It is generally reported as the number of new cases occurring within a period of time or as a fraction of the population.
Prevalence is the proportion of disease or risk factor affecting a population (for example, cancer, smoking or seat-belt use). It is arrived at by comparing the number of people found to have the condition with the total number of people studied and is usually expressed as a fraction.
|Disease||% US population||per 100,000|
|Hashimoto's autoimmune thyroiditis||0.742||791.70|
|Diabetes mellitus, type 1||0.450||480.00|
|Pernicious anemia / atrophic gastritis||0.141||150.90|
|Immune thrombocytopenic purpura||0.068||72.00|
|Systematic Lupus Erythematosus||0.030||32.00|