Screening intervention Colorectal polyps Miss rate Back-
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: Asymptomatic subjects aged 50 to 75 years old who participated in a health promotion program at the King Chulalongkorn Memorial Hospital were recruited.
Exclusion criteria
Exclusion criteria: 1. Family history of hereditary colorectal cancer (≥ 2 first degree relatives with CRC or at least 1 first degree relative with CRC before 60 years) 2. inflammatory bowel disease, 3. prior history of colorectal cancer 4. previous colorectal surgery 5. severe coexisting illness (American Society of Anesthesiologists grade 3 or 4) 6. previous colon examination (endoscopy and radiological imaging) within 5 years 6. symptoms of lower GI tract (a lower gastrointestinal bleeding, bowel habit changes, unexplained weight loss, and anemia)
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The polyp miss rate while performing colonoscopy After second colonoscopy in the same day Number of missed polyps | — |
Secondary
| Measure | Time frame |
|---|---|
| The independent factors that influence miss rate determined by same day back-to-back colonoscopies After second colonoscopy in the same day cecal intubation time, colonoscopic withdrawal time, location of polyps, morphology of polyps, size | — |