TABLE 2.
Clinicopathological features and outcomes of the BA‐ESD and C‐ESD groups after propensity score matching
| Variables | BA‐ESD (n = 78) | C‐ESD (n = 78) | p‐value |
|---|---|---|---|
| Age (year, mean ± SD) | 70 ± 11 | 69 ± 11 | 0.78 |
| Sex, male (%) | 50 (64) | 45 (58) | 0.41 |
| BMI (kg/m2, mean ± SD) | 23 ± 4 | 23 ± 3 | 0.95 |
| History of abdominal surgery (%) | 19 (24) | 23 (29) | 0.47 |
| Tumor location (%) | 0.41 | ||
| Cecum | 27 (35) | 29 (37) | |
| Ascending colon | 36 (46) | 40 (51) | |
| Transverse colon | 15 (19) | 9 (12) | |
| Tumor size (mm, mean ± SD) | 31 ± 13 | 28 ± 13 | 0.23 |
| Growth type (%) | 0.72 | ||
| LST‐G | 25 (32) | 28 (36) | |
| LST‐NG | 42 (54) | 37 (47) | |
| Polypoid | 11 (14) | 13 (17) | |
| Preoperative scope operability (%) | 0.99 | ||
| Good | 5 (6) | 5 (6) | |
| Fair | 26 (33) | 27 (35) | |
| Poor | 47 (60) | 46 (59) | |
| Colonoscope (%) | 0.50 | ||
| PCF‐H290TI | 54 (69) | 50 (64) | |
| PCF‐Q260AZI | 24 (31) | 28 (36) | |
| Submucosal fibrosis (%) | 0.19 | ||
| None/Mild | 56 (72) | 63 (81) | |
| Severe | 22 (28) | 15 (19) | |
| Histology (%) | 0.88 | ||
| Adenoma | 39 (50) | 40 (51) | |
| Tis carcinoma | 28 (36) | 24 (31) | |
| T1a carcinoma | 4 (5) | 5 (6) | |
| T1b carcinoma | 7 (9) | 9 (12) | |
| Procedure time (min, mean ± SD) | 87 ± 64 | 72 ± 52 | 0.24 |
| Dissection speed (mm2/min, mean ± SD) | 16 ± 10 | 16 ± 9 | 0.53 |
| Intraoperative scope operability (%) | 0.0006 | ||
| Good | 25 (32) | 17 (22) | |
| Fair | 3 (4) | 20 (26) | |
| Poor | 50 (64) | 41 (53) | |
| Use of snaring (%) | 14 (18) | 7 (9) | 0.10 |
| En bloc resection (%) | 74 (95) | 77 (99) | 0.17 |
| R0 resection (%) | 72 (92) | 75 (96) | 0.30 |
| Adverse event (%) | |||
| Intraoperative perforation | 4 (5) | 5 (6) | 0.73 |
| Delayed perforation | 1 (1) | 0 (0) | 0.32 |
| Postoperative bleeding | 3 (4) | 1 (1) | 0.31 |
Abbreviations: BA‐ESD, balloon‐assisted ESD; BMI, body mass index; C‐ESD, conventional ESD; ESD, endoscopic submucosal dissection; LST‐G, laterally spreading tumor granular type; LST‐NG, laterally spreading tumor non‐granular type; SD, standard deviation.