Polyp detection with conventional colonoscopy (CC) versus cap-assisted colonoscopy (CAC): per-protocol analysis
| CC (n=683) | CAC (n=656) | p Value | |
| Total number of polyps | 665 | 682 | 0.71 |
| Total number of adenomas | 339 | 341 | 0.92 |
| Advanced adenomas | 81 | 64 | 0.13 |
| Total number of serrated adenomas | 56 | 45 | 0.23 |
| Total number of hyperplastic polyps | 270 | 296 | 0.28 |
| Adenomas per subject (mean, SD) | 0.50 (1.06) | 0.52 (1.05) | 0.83 |
| Advanced adenomas per subject (mean, SD) | 0.12 (0.45) | 0.10 (0.37) | 0.34 |
| Subjects ≥1 adenoma (n, %) | 196 (29) | 189 (29) | 0.96 |
| Subjects ≥1 advanced adenoma (n, %) | 63 (9) | 51 (8) | 0.34 |
| Size of all adenomas | |||
| <6 mm per subject (mean, SD) | 0.32 (0.78) | 0.36 (0.81) | 0.35 |
| 6–9 mm per subject (mean, SD) | 0.08 (0.35) | 0.09 (0.34) | 0.99 |
| ≥10 mm per subject (mean, SD) | 0.09 (0.35) | 0.07 (0.29) | 0.18 |
| Flat morphology | |||
| Flat adenomas per subject (mean, SD) | 0.02 (0.13) | 0.02 (0.15) | 0.49 |
| Subjects ≥1 flat adenoma (n, %) | 14 (2) | 16 (2) | 0.63 |
| Proximal location | |||
| Proximal adenomas per subject (mean, SD) | 0.25 (0.69) | 0.25 (0.71) | 0.72 |
| Proximal advanced adenomas per subject (mean, SD) | 0.03 (0.19) | 0.02 (0.19) | 0.07 |
| Subjects ≥1 proximal adenoma (n, %) | 115 (17) | 104 (16) | 0.63 |
| Subjects ≥1 proximal advanced adenoma (n, %) | 22 (3) | 11 (2) | 0.07 |