JUP and rheumatoid arthritis: In particular, patients with RA showed a higher positivity of Pg DNA in the synovial tissue compared to controls (33.3% in RA vs. 5.9% in UPIA + others, P <0.01) and also when compared to UPIA (0%, P = 0.04 vs. RA patients) or other arthritides (8.7%, P <0.01 vs. RA patients), whereas the difference was not significant when comparing RA only to SpA patients (16.7% in SpA, P = ns vs. RA patients).