Some studies indicate that the incidence of autoimmunity as 5% and then there are other reference that suggest it is as high as 15%. This is big difference and we need to define it better. Any information on this topic is welcomed.
The difference is in terms: "autoimmunity" and "autoimmune disease", and also age factor. The differences are biger than you wrote.
We wrote a review about it: Ewa Bryl and Jacek M. Witkowski "Autoimmunity and Autoimmune diseases in the elderly". T Fulop et al. Handbook on Immunosenescence. Doi 10.1007/978-1-4020-9062-2_51, Springer Science+Business Media B.V. 2009.
. I do agree there is a difference in autoimmunity and autoimmune diseases. A person may have autoimmune response but may or may not have an auotimmune disease. In many cases autoimmune disease may onset many years after the auotimmune response such as in diabetes, celiac disease and many more organ specific and systemic diseases. I appreciate your contributions in the field and would like a copy of your article.
According to the AARDA and the NIH: It is estimated that approximately 24 miilion people in the US has an autoimmune disease(s) and this incidence is inreasing as we discover diseases that are now autoimmune and previously was not considered to be autoimmune. In addition newer findings are indicating the higher prevalence of auoimmune diseases. Tus I believe it ma be safe to say that the incidence of autoimmune diseases is about 10%.