The average percentage increase per year of the incidence and prevalence of autoimmune diseases worldwide were 19% and 13% respectively.
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.
Chronic inflammation is associated with many diseases and conditions. There are many inflammatory markers that can be measured. Researchers appear to be continually looking to add to the list of makers to use to identifying diseases. C-Reactive Protein is one common but non-specific maker. Fibrinogen is another that some researchers have added to their inflammatory marker list.