PRTN3 and rheumatoid arthritis: Comparable percentages of UA or RA patients achieved remission after 2 years (UA 64/122 (52 %) and RA 234/479 (49 %), p=0.25), but significantly more UA patients, of whom 94 % were ACPA-negative, achieved DFR (41/122 (34 %) compared to 89/479 (19 %) in RA patients, p<0.001) (Additional file 1: Table S1).