Patients belonged to three main entities: rheumatoid arthritis (RA, <i>n</i> = 32), collagen diseases (CD, <i>n</i> = 56) also including systemic sclerosis (SSc, <i>n</i> = 11), and other autoimmune diseases (<i>n</i> = 12). sICAM-1 was similar among groups. sELAM-1 was elevated by 1.9-fold in only in SSc. sVCAM-1 was elevated by 3.1-fold in RA and by 3.3-fold in CD and in other autoimmune diseases by 3.4-fold.