ITGAM and rheumatoid arthritis: Significantly higher mean frequencies of surface-stained cells presenting CD11b from whole blood were observed in patients with AOSD (82.9% ± 8.8%) than in patients with RA (55.6% ± 17.3%, p < 0.001) or in HC (50.5% ± 11.7%, p < 0.001; Figure 2A).