Table 2.
Colonoscopy results of high risk questionnaire items
| Cancer | Advanced adenomas | Adenomas | Non-adenomatous polyps | Normal results | |
| iFOBT | 17 | 27 | 56 | 11 | 128 |
| History of malignant tumor | 1 | 3 | 9 | 7 | 41 |
| Colorectal cancer (CRC) in first degree relatives | 2 | 7 | 29 | 11 | 81 |
| History of adenomatous polyps (HAP) | 0 | 9 | 25 | 6 | 48 |
| History of mucous and bloody stool | 5 | 4 | 15 | 10 | 101 |
| History of chronic diarrhea | 2 | 10 | 29 | 10 | 120 |
| History of chronic constipation | 0 | 8 | 24 | 13 | 102 |
| History of chronic appendicitis or appendectomy | 3 | 9 | 33 | 14 | 122 |
| History of chronic cholecystitis or cholecystectomy | 3 | 14 | 50 | 19 | 169 |
| History of psychiatric trauma | 4 | 5 | 18 | 2 | 73 |