China Colorectal Cancer Screening Trial 1 (C-Cost1)

Colonoscopy is used to examine the inner lining of the colon and rectum. During the procedure, if suspicious growths (e.g., polyps) are detected, they will be biopsied and sent for pathological examination.

FIT stands for Fecal Immunochemical Test, a non-invasive screening tool used primarily to detect hidden blood in the stool, which may indicate colorectal cancer or precancerous polyps. Positive cut-off level: 100 ng/mL.

Blood test based on cfDNA methylation will be performed.