Table 2.
Colonoscopy and Polyp Characteristics
| Characteristics | |
|---|---|
| Total study colonoscopies, n | 1451 |
| Study colonoscopies per participant, mean (IQR) | 56.1 (26.0–71.8) |
| Immediate post-procedure surveillance interval predictions made | 898 (61.8) |
| Delayed surveillance interval prediction incorporating histologya | 348 (24.0) |
| Polyp >5 mm found | 276 (19.0) |
| >2 Low confidence diagnoses | 31 (2.1) |
| History of colorectal cancer | 21 (1.4) |
| ≥10 polyps found | 20 (1.4) |
| Surveillance interval not changed by NBI predictions | 157 (10.8) |
| Inadequate bowel prep | 66 (4.5) |
| Deviation from guidelines (elderly, comorbid) | 75 (5.2) |
| Incomplete procedure | 7 (0.5) |
| Familial syndrome (Lynch, FAP, etc) | 6 (0.4) |
| History of inflammatory bowel disease | 3 (0.2) |
| Procedures excluded from surveillance interval analysis | 48 (3.3) |
| Unable to retrieve study polyp | 22 (1.5) |
| Incomplete research form | 26 (1.8) |
| Study polyps, n | 3012 |
| Study polyps per participant, mean (IQR) | 114.8 (62.3–167.3) |
| Diminutive polyp histology, n | 3012 |
| Adenoma | 1600 (53.1) |
| Non adenoma | 1237 (41.1) |
| Sessile serrated polyp | 45 (1.5) |
| Otherb | 53 (1.8) |
| High-grade dysplasia/cancer | 0 (0) |
| Not retrieved | 8 (0.3) |
| Missing | 69 (2.3) |
| Diminutive polyp confidence, n | 3012 |
| High confidence | 2239 (74.3) |
| Low confidence | 731 (24.3) |
| Missing | 42 (1.4) |
| Diminutive polyp location, n | 3012 |
| Cecum | 318 (10.6) |
| Ascending | 601 (20.0) |
| Transverse | 615 (20.4) |
| Descending | 343 (11.4) |
| Sigmoid | 566 (18.8) |
| Rectum | 522 (17.3) |
| Missing | 47 (1.6) |
| Total rectosigmoid diminutive polyp predictions, n | 1135 |
| High confidence | 844 (74.4) |
| Low confidence | 251 (22.1) |
| Missing | 40 (3.5) |
NOTE. Values are n (%) unless otherwise note.
FAP, familial adenomatous polyposis; IQR, interquartile range.
a
Performed by study personnel.
b
Other: inflammatory, carcinoid, lymphoid.