CRP and ulcerative colitis: UC: Ulcerative colitis; CD: Crohn's disease; PGA: Physician global assessment; SCCAI: Simple Clinical Colitis Activity Index; CDAI: Crohn’s Disease Activity Index; HBI: Harvey Bradshaw Index; IBDEX: Inflammatory Bowel Disease Index; CRP: C-reactive protein; ESR: Erythrocyte sedimentation rate; pANCA: Perinuclear antineutrophil cytoplasmic antibody; ASCA: Anti-Saccharomyces cerevisiae antibody; MRE: Magnetic resonance enterography; CTE: Computed tomography enterography; MRI: Magnetic resonance imaging.