Table 1.
Baseline Characteristics
| Characteristic | Data |
|---|---|
| Age, y, median (IQR) | 66 (57–73) |
|
| |
| Sex, men/women, n | 400/292 |
|
| |
| ASA grade; n (%) | |
| I | 72 (10.4) |
| II | 335 (48.4) |
| III | 269 (38.9) |
| IV | 16 (2.3) |
|
| |
| Lesion size, mm, median (IQR) | 40 (25–52) |
|
| |
| Lesion site | |
| Esophagus, n (%) | 181 (26.2) |
| Distal esophagus/GEJ, n | 121 |
| Esophageal body, n | 60 |
| Stomach, n (%) | 101 (14.6) |
| Antrum, n | 37 |
| Body, n | 30 |
| Lesser curvature, n | 14 |
| Fundus, n | 4 |
| Cardia, n | 16 |
| Duodenum, n (%) | 11 (1.5) |
| Colon, n (%) | 399 (57.7) |
| Ileocecal valve, n | 11 |
| Cecum, n | 51 |
| Ascending colon, n | 81 |
| Transverse colon, n | 22 |
| Descending colon, n | 14 |
| Sigmoid colon, n | 32 |
| Rectum, n | 188 |
|
| |
| Polyp morphology based on Paris Classification, n (%) | |
| Is | 132 (19.1) |
| Ip | 17 (2.5) |
| IIa | 268 (38.7) |
| IIb | 48 (6.9) |
| IIa+IIc | 66 (9.5) |
| IIa+Is | 32 (4.6) |
| Is+IIa | 24 (3.5) |
|
| |
| Gross morphology colorectal lesions (n = 399), n (%) | |
| Laterally spreading tumor, granular | |
| Uniform | 36 (9) |
| Mixed | 167 (41.9) |
| Laterally spreading tumor, nongranular | |
| Flat | 79 (19.8) |
| Pseudodepressed | 42 (10.5) |
|
| |
| Interventions before ESD, n (%) | |
| None | 61 (8.8) |
| Tattoo underneath lesion | 62 (8.9) |
| Cold biopsy forceps | 570 (82.4) |
| Hot biopsy forceps | 5 (0.72) |
| Snare | 51 (7.4) |
| Argon plasma coagulation | 23 (3.3) |
| Radiofrequency ablation | 46 (6.6) |
| Submucosal injection only | 4 (0.58) |
| Endoscopic resection attempt | 126 (18.2) |
ASA, American Society of Anesthesiologists physical status classification; GE gastroesophageal junction.