CRP and ulcerative colitis: The diagnosis of ulcerative colitis mainly relies on clinical symptoms, endoscopic examination, and pathological biopsy, and some hematological indicators such as C-reactive protein (CRP), Erythrocyte sedimentation rate (ESR) can aid in UC diagnosis (Conrad et al., 2014; Ungaro et al., 2017), Certain fecal biochemical markers, such as calprotectin and S100A12, also exhibit diagnostic efficacy for UC (Liu et al., 2022; Mosli et al., 2015).