Inter-group comparison showed that patients in active RA group (n = 27) had significantly higher SLAMF6 expression than those in inactive RA group (n = 23) (0.000708 ± 0.000210 vs. 0.000527 ± 0.000222, p = 0.005) (Fig. 2a). This evidence concerns the gene SLAMF6 and rheumatoid arthritis.