To evaluate where CXCL10 identifies a specific cause of CKD, such as immune-mediated causes of renal injury from systemic lupus erythematosus, rheumatoid arthritis, antineutrophil cytoplasmic antibody (ANCA)-positive vasculitis, we evaluated which CKD categories had high abundance of urinary CXCL10. This evidence concerns the gene CXCL10 and rheumatoid arthritis.