Table. Prevalence of rheumatic diseases in Germany (9).

	Prevalence (affected in Germany)	Incidence (incidence of new cases/year)
Inflammatory rheumatological conditions	2.1% approx. 1.5 million adults
Rheumatoid arthritis	0.8% 550 000	0.04% 27 000
Total spondyloarthritis group	0.5–2%
Axial spondyloarthritis, incl. ankylosing spondylitis	0.8% 550 000	20/100 000
Psoriatic arthritis	0.2% 140 000
Total connective tissue disorders/vasculitis	0.3% 210 000
– thereof systemic lupus erythematosus (SLE)*	0.04% 35 000	1–2/100 000 in Europe
Crystal arthropathies Gouty arthritis	3%

* Health insurance data from the Federal State of North Rhine-Westphalia, Germany