PRTN3 and rheumatoid arthritis: In ACPA-negative RA, again for the same categories, ORs (95% CI) RA were 1.70 (0.69–4.19), 3.11 (1.83–5.29), and 2.07 (0.66–10.37), respectively (p = 0.25, <0.01, and 0.17, respectively).