However, the baseline MRI sacroiliitis score, CRP, BASDAI, BASFI, and ESR could not predict the achievement of an ASAS20 response at week 24 after 6 infliximab infusions (MRI sacroiliitis score: AUC = 0.575; P = 0.434; CRP: AUC = 0.641; P = 0.140; BASDAI: AUC = 0.649; P = 0.118; BASFI: AUC = 0.625; P = 0.191; ESR: AUC = 0.558; P = 0.545) (Figures 1(d), 1(e), and 1(f)). Here, CRP is linked to Sacroiliac arthritis.