Increased serum IL-18 (p = 0.05), ADMA (p = 0.02), and CRP levels (p = 0.02) and ESR (p = 0.01) and decreased serum fetuin-A level (p = 0.02) were associated with an increased risk of axSpA and IBD (Table 3). The gene discussed is CRP; the disease is inflammatory bowel disease.