Table 2.
Results of a Univariate Analysis of Tumor- and Treatment-related Factors for Perforation during Colorectal Endoscopic Submucosal Dissection.
| Factors | Total | Perforation (+) | Perforation (-) | p |
|---|---|---|---|---|
| Number of patients | 398 | 12 | 387 | |
| Tumor location | ||||
| Colon | 290 | 10 (3.4%) | 280 (96.6%) | N.S. |
| Rectum | 108 | 2 (1.9%) | 106 (98.1%) | |
| Lesion size (mm) | 28.6±14.2 | 38.4±13.8 | 28.3±14.1 | <0.05 |
| Resected size (mm) | 35.0±13.6 | 44.5±15.2 | 34.8±13.5 | <0.05 |
| Operation time (min) | 74.0±56.2 | 159.2±119.8 | 71.4±51.2 | <0.05 |
| Invasion morphology | ||||
| Superficial | 328 | 8 (2.4%) | 320 (97.6%) | N.S. |
| Protruded | 69 | 4 (5.8%) | 65 (94.2%) | |
| Histological type | ||||
| Adenoma | 208 | 3 (1.4%) | 205 (98.6%) | N.S. |
| Cancer | 189 | 9 (4.8%) | 180 (95.2%) | |
| Closure with hemoclips | ||||
| Yes | 129 | 6 (4.7%) | 123 (95.3%) | N.S. |
| No | 269 | 6 (2.2%) | 263 (97.8%) |
N.S.: not significant