Spondyloarthropathies in Autoimmune Diseases and Vice Versa

Table 6

Prevalence of SpAs in patients with ADs.

n (%)	RA (𝑛=671)	SLE (𝑛=239)	SS (𝑛=167)	All (𝑛=1077)
AS	0	0	1 (0.59)	1 (0.092)
PsA	1 (0.15)	0	0	1 (0.092)
IBD	2 (0.3)	1 (0.41)	0	3 (0.28)
All SpAs	3 (0.44)	1 (0.41)	1 (0.59)	5 (0.46)

SLE: systemic lupus erythematosus, RA: rheumatoid arthritis, SS: Sjögren’s syndrome, AS: ankylosing spondylitis, PsA: psoriatic arthritis, IBD: inflammatory bowel disease, and SpAs: spondyloarthropathies.