AICDA and rheumatoid arthritis: Thus, the prevalence of autoantibody groups that we presented can be assumed to be distinctly higher than the prevalence of the corresponding AID: For instance, the prevalence of RA in Germany is 0.8%, with women being affected 3 times more often than men (48), while we determined RA-associated autoantibodies in 35.6% of the sample, without pronounced differences between men and women (34.1% and 36.6%, respectively).