Serum CXCL10 levels in the active PMR group were not significantly different from those in the healthy control group at 92.92 (IQR 30.85–178.14) pg/ml, and in the RA group at 9.36 (IQR 0.00–138.38) pg/ml (P > 0.05). The gene discussed is CXCL10; the disease is rheumatoid arthritis.