Polyp detection rates
| Linked Colour imaging (N=160) | High-definition white light endoscopy (N=172) | Risk ratio (two-sided 95% CI) | P value (two-sided) | |
| Polyps† | 71 (44.4%) | 62 (36.0%) | 1.23 (0.95 to 1.60) | 0.12 |
| Adenomas | 58 (36.3%) | 44 (25.6%) | 1.42 (1.02 to 1.96) | 0.04* |
| Advanced adenomas | 7 (4.4%) | 8 (4.6%) | 0.94 (0.35 to 2.43) | 1.00‡ |
| Flat adenomas§ | 27 (16.9%) | 20 (11.6%) | 1.45 (0.85 to 2.48) | 0.18 |
| ≤5 mm adenomas | 52 (32.5%) | 38 (22.1%) | 1.47 (1.03 to 2.11) | 0.03* |
| >5 mm adenomas | 12 (7.5%) | 12 (7.0%) | 1.09 (0.50 to 2.32) | 0.85 |
| Proximal adenomas¶ | 45 (28.1%) | 32 (18.6%) | 1.51 (1.01 to 1.51) | 0.04† |
| Serrated polyps | 28 (17.5%) | 24 (14.0%) | 1.25 (0.76 to 2.07) | 0.38 |
| Sessile serrated lesions | 11 (6.9%) | 12 (7.0%) | 0.98 (0.45 to 2.17) | 0.97 |
| Proximal serrated polyps¶ | 18 (11.3%) | 17 (9.9%) | 1.14 (0.61 to 2.13) | 0.69 |
| Hyperplastic polyps | 17 (10.6%) | 15 (8.7%) | 1.21 (0.63 to 2.36) | 0.56 |
Data are n (%).
*p<0.05, **p<0.01.
†1–5 mm hyperplastic polyps in the rectosigmoid, normal mucosa, other non-neoplastic lesions and lesions not retrieved for pathology were excluded.
‡P value was calculated using Fisher’s exact test instead of χ2 test since the expected values in any cells of contingency table were below 10.
§Morphology 0-IIa, 0-IIb, or IIc according to Paris classification.
¶Proximal to splenic flexure.