colorectal lesion
Conditions
Interventions
None listed
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. Patients who underwent colonoscopy at the Digestive Disease Center, Showa University Northern Yokohama Hospital from June 2020 to March 2025 2. Patients aged 20 years or older at the time of colonoscopy.
Exclusion criteria
Exclusion criteria: 1. Patients with prior lesion information 2. Patients with inflammatory bowel disease (including various kinds of colitis except for UC or Chron) 3. Polyposis patient 4. Patients who refuse to use the information they use
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Adenoma detection rate per one colonoscopy | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Flat and depressed tumor detection rate per colonoscopy 2. Detection rate of advanced adenoma per colonoscopy Advanced adenoma is an adenoma of 10 mm or more, histopathologically villous or tubulovillous component, and high-grade dysplasia. 3. Sessile serrated lesion (SSL) detection rate per colonoscopy 4. Diminutive adenoma detection rate 5. Polyp detection rate 6. Mean number of adenomas per procedure (MAP) 7. Total observation time (including treatment time) from reaching the cecum to withdrawal through the anus. 8. Incident rate 9. Medical cost per examination (treatment-related costs/pathological diagnosis costs) 10. Rate of post colonoscopy colorectal cancer and advanced adenoma 11. CUSUM curve analysis for the ADR | — |
Countries
Japan
Contacts
Showa University Northern Yokohama Hospital Digestive Disease Center