Table 2.
Univariate analysis of the related factors of incomplete resection
| Variables | Incomplete resection group (n = 83) | Complete resection group (n = 243) | P-value |
|---|---|---|---|
| Patient characteristics | |||
| Age, mean ± SD, years | 47.0 ± 10.7 | 47.4 ± 11.3 | 0.818 |
| Male | 51 (61.4) | 157 (64.6) | 0.605 |
| Endoscopic features | |||
| Central depression | 0.002 | ||
| Present | 14 (16.9) | 14 (5.8) | |
| Absent | 69 (83.1) | 229 (94.2) | |
| Tumor size | 0.349 | ||
| <8 mm | 69 (83.1) | 212 (87.2) | |
| 8–10 mm | 14 (16.9) | 31 (12.8) | |
| Distance from anal verge | 0.175 | ||
| ≥7 cm | 16 (19.3) | 32 (13.2) | |
| <7 cm | 67 (80.7) | 211 (86.8) | |
| Treatment-related factor | |||
| Preoperative EUS performing | 30 (36.1) | 158 (65.0) | <0.001 |
| Endoscopic treatment | <0.001 | ||
| Polypectomya | 35 (42.2) | 9 (3.7) | |
| EMR | 9 (10.8) | 26 (10.7) | |
| ESD | 39 (47.0) | 208 (85.6) | |
| Intraoperative complication | 1 (1.2) | 11 (4.5) | 0.308b |
| Treatment time | 0.002 | ||
| Early period | 18 (21.7) | 21 (8.6) | |
| Later period | 65 (78.3) | 222 (91.4) | |
| Work experience | 0.507 | ||
| <10 years | 39 (47.0) | 104 (42.8) | |
| ≥10 years | 44 (53.0) | 139 (57.2) | |
| Pathological features | |||
| Tumor grade | 0.544b | ||
| G1 | 78 (94.0) | 233 (95.9) | |
| G2 | 5 (6.0) | 10 (4.1) | |
| Mitotic rate | 0.269b | ||
| <2/10 HPF | 81 (97.6) | 241 (99.2) | |
| ≥2/10 HPF | 2 (2.4) | 2 (0.9) | |
| Lymphovascular invasion | 2 (2.4) | 0 (0) | 0.064b |
| CgA staining positive | 38 (45.8) | 95 (39.1) | 0.284 |
| Syn staining positive | 82 (98.8) | 239 (98.4) | 1.000b |
SD, standard deviation; EUS, endoscopic ultrasonography; ESD, endoscopic submucosal dissection; EMR, endoscopic mucosal resection; HPF, high power field; CgA, chromogranin A; Syn, synaptophysin.
a
Containing cold-forceps polypectomy and snare polypectomy.
b
P-value is calculated by using Fisher exact test.