Table 3.
Histological characteristic of polyps detected in the narrow-band imaging group and conventional group on a per-polyp basis.
| Outcomes (Number of polyps by histological category) |
NBI group (n = 241) | Conventional group (n = 241) | Measurement of the intervention effect* | Significance (p) |
|---|---|---|---|---|
| Tubular adenoma or adenomatous polyp | 46 | 47 | 0.98 (0.68 to 1.41) | Ns |
| Hyperplastic polyps | 22 | 42 | 0.52 (0.32 to 0.85) | 0.009 |
| Villous adenoma | 1 | 1 | 1.00 (0.06 to 15.90) | Ns |
| Tubulovillous adenoma | 1 | 9 | 0.11 (0.01 to 0.87) | 0.04 |
| Adenocarcinoma | 1 | 1 | 1.00 (0.06 to 15.90) | Ns |
| Other type of lesions | 2 | 1 | 2 (0.18 to 21.91) | Ns |
| Total number of polyps | 70 | 99 | 0.71 (0.55 to 0.91) | 0.006 |
| Total number of lesions | 73 | 101 | 0.71 (0.57 to 0.92) | 0.009 |
* Rate ratio (RR) and 95% CI or mean difference (MD) and 95% CI.