Impact of Real-time Notification of Colonoscopic Optical Diagnosis on Patients' Anxiety and Depression After Polypectomy

Inclusion Criteria: * Age of ≥ 40 years and \< 80 years * Outpatients who prepare receiving sedated colonoscopy * Subjects who have signed informed consent form of this study * Informed consensus has been obtained that endoscopic resection should be performed if a colorectal polyp is found * Eastern Cooperative Oncology Group (ECOG) performance status scale among 0 to 2 Exclusion Criteria: * Subjects with any of the following prior history or current conditions: * (a) Contraindications to colonoscopy * (b) Major mental illnesses, e.g. major depressive disorder, schizophrenia, generalized anxiety disorder ... * (c) Inflammatory bowel disease * (d) Hereditary or non-hereditary polyposis syndrome, hereditary non-polyposis colorectal cancer * (e) Uncured colorectal cancer * (f) Active gastrointestinal bleeding * (g) Pregnancy * Subjects who do not received polypectomy during colonoscopy.