Table 3.
Risk factors for piecemeal resection and R1 resection
| En bloc vs. piecemeal resection (p value) | R0 vs. R1 resection (p value) | |
|---|---|---|
| Mean size, mm | 44 vs. 38 (0.439) | 42 vs. 52 (0.111) |
| Mean procedure time, min | 104 vs. 158 (0.089) | 97 vs. 150 (<0.001) |
| LST morphology, % | 0.958 | 0.772 |
| G-H (n = 27) | 96 vs. 4 | 85 vs. 15 |
| G-NM (n = 103) | 95 vs. 5 | 83 vs. 17 |
| NG-FE (n = 3) | 100 vs. 0 | 67 vs. 33 |
| NG-PD (n = 2) | 100 vs. 0 | 100 vs. 0 |
| Histology, % | 0.578 | 0.595 |
| Adenocarcinoma (n = 29) | 100 vs. 0 | 90 vs. 10 |
| HGD (n = 67) | 94 vs. 6 | 78 vs. 22 |
| LGD (n = 48) | 96 vs. 4 | 83 vs. 17 |
| Serrated with dysplasia (n = 3) | 100 vs. 0 | 100 vs. 0 |
| Perforation, % | 0.190 | 1.000 |
| Yes (n = 5) | 80 vs. 20 | 80 vs. 20 |
| No (n = 142) | 97 vs. 3 | 82 vs. 18 |
| Knife, % | 0.278 | 0.153 |
| DualKnife (n = 113) | 97 vs. 3 | 86 vs. 14 |
| DualKnife + IT nano knife (n = 34) | 91 vs. 9 | 71 vs. 29 |
| Hybrid technique, % | <0.001 | 0.003 |
| Yes (n = 8) | 50 vs. 50 | 38 vs. 62 |
| No (n = 139) | 99 vs. 1 | 85 vs. 15 |
| Local, % | 0.253 | 1.000 |
| Colon (n = 24) | 92 vs. 8 | 83 vs. 17 |
| Rectum (n = 123) | 97 vs. 3 | 82 vs. 18 |
LSTG-H, laterally spreading tumours of the granular-homogeneous type; LSTG-NM, laterally spreading tumours of the granular-nodular mixed type; LSTNG-FE, laterally spreading tumours of the non-granular-flat elevated type; LSTNG-PD, laterally spreading tumours of the non-granular-pseudodepressed type; HGD, highgrade dysplasia; LGD, low-grade dysplasia.