Soluble Axl and soluble Mer levels are associated with British Isles Lupus Assessment Group index hematological and renal involvement, and soluble Mer is also associated with total BILAG score. Levels of soluble Axl (sAxl) or soluble Mer (sMer) were measured in 107 matched and unmatched patients and compared according to active and/or stable (BILAG score ≥1) or inactive and/or absent (BILAG = 0) organ involvement (A) and (B). Associations with total BILAG score were then calculated (C). BILAG, British Isles Lupus Assessment Group index; hematol, hematological.*P < 0.05; **P < 0.01; ***P < 0.001; n.s., not significant.