Clinical Research Directory

Inclusion Criteria: 1. Chronological age ≥40 years; 2. Full capacity for action; 3. After enrollment, the participants were able to complete the Colorectal Cancer Risk Factor Assessment Questionnaire and the annual follow-up interviews; 4. In the course of the study, the information related to tumor diagnosis in other hospitals can be timely fed back to the researchers; Exclusion Criteria: 1. History of colorectal cancer and other malignant tumors; 2. Previous colorectal resection; 3. undergoing any cancer-related treatment; 4. Patients who have received major surgical treatment such as blood transfusion or transplantation within 3 months; 5. Participate in other interventional clinical investigators within 3 months; 6. Pregnant or lactating women; 7. Have autoimmune disease, hereditary disease, mental illness/disability, etc 8. Poor compliance, unable to complete the study.