IL6 and rheumatoid arthritis: In particular, RA patients (n = 57) in the highest tertile (tertile 3, adjusted IL-6 levels ≥116.9) of urinary IL-6 showed a 2.9-fold increase in radiographic progression as compared with those (n = 56) in the lowest tertile (tertile 1, adjusted IL-6 levels <29.9) (Table 2).