CXCR3 was 5.3-fold greater (p = 0.011) in patients with PsA than in patients with OA, 32.3-fold greater (p = 1.2 × 10−6) than in patients with gout, and 3.9-fold greater (p = 0.02) than in patients with RA. Here, CXCR3 is linked to rheumatoid arthritis.