Table 2.
Characteristics of Polyps with or without CSM
| Variable | Total | Presence of CSM* | Absence of CSM | p-value |
|---|---|---|---|---|
| Histology I | 313 | 103 | 210 | <0.001 |
| Neoplastic | 94 (91.3) | 154 (73.3) | ||
| Non-neoplastic | 9 (8.7) | 56 (26.7) | ||
| Histology II | 249 | 95 | 154 | <0.001 |
| Advanced histology | 22 (23.2) | 8 (5.2) | ||
| Tubular adenoma | 73 (76.8) | 146 (94.8) | ||
| Morphology* | 313 | 103 | 210 | 0.022 |
| Flat (IIa, Is, LST) | 71 (68.9) | 170 (81.0) | ||
| Protruded (Isp, Ip) | 32 (31.1) | 40 (19.0) | ||
| Location | 313 | 103 | 210 | <0.001 |
| Proximal colon | 17 (16.5) | 112 (53.3) | ||
| Distal colon | 86 (83.5) | 98 (46.7) | ||
| Size, mm | 313 | 103 | 210 | 0.001 |
| <5 | 19 (18.4) | 68 (32.4) | ||
| 5 to <10 | 52 (50.5) | 110 (52.4) | ||
| ≥10 | 32 (31.1) | 32 (15.2) | ||
| Size of polyps, mm | 7.06±4.85 (2–50) | 8.63±6.52 (2–50) | 6.30±3.55 (2–30) | 0.001 |
| Pit pattern | 313 | 103 | 210 | 0.003 |
| Pit I, II (non-neoplastic) | 9 (8.7) | 47 (22.4) | ||
| Pit III, IV, V (neoplastic) | 94 (91.3) | 163 (77.6) |
Data are presented as the number (%) or median±SD (range).
CSM, chicken skin mucosa; LST, laterally spreading tumor.
*The sessile (0-Is), slightly elevated (0-IIa), flat (0-IIb), and LST were defined as flat lesions, and pedunculated (0-Ip) and sub-pedunculated (O-Isp) tumors were defined as protruding lesions.