Table 2 Comparison of intraoperative and postoperative clinicopathological characteristics between the two groups.
Characteristics | Overall (n = 229) | Dual knife group (n = 121) | Injection mucosa knife group (n = 108) | P-value |
|---|---|---|---|---|
Total procedure time, mins, median (IQR) | 58 (50, 65) | 65 (60, 71) | 50 (45, 55) | < 0.001 |
Mucosal dissection time, mins, median (IQR) | 48 (40, 56) | 56 (50, 61) | 40 (35, 46) | < 0.001 |
Submucosal dissection rate, cm²/mins, median (IQR) | 0.09 (0.06, 0.15) | 0.08 (0.05, 0.11) | 0.12 (0.09, 0.20) | < 0.001 |
Intraoperative perforation, n (%) | > 0.999 | |||
Yes | 1 (0.4%) | 1 (0.8%) | 0 (0.0%) | |
No | 228 (99.6%) | 120 (99.2%) | 108 (100.0%) | |
Severe intraoperative hemorrhage, n (%) | 0.506 | |||
Yes | 9 (3.9%) | 6 (5.0%) | 3 (2.8%) | |
No | 220 (96.1%) | 115 (95.0%) | 105 (97.2%) | |
R0 resection, n (%) | 0.777 | |||
Yes | 213 (93.0%) | 112 (92.6%) | 101 (93.5%) | |
No | 16 (7.0%) | 9 (7.4%) | 7 (6.5%) | |
Postoperative bleeding, n (%) | 0.499 | |||
Yes | 2 (0.9%) | 2 (1.7%) | 0 (0.0%) | |
No | 227 (99.1%) | 119 (98.3%) | 108 (100.0%) | |
Postoperative fever, n (%) | > 0.999 | |||
Yes | 9 (3.9%) | 5 (4.1%) | 4 (3.7%) | |
No | 220 (96.1%) | 116 (95.9%) | 104 (96.3%) | |
Postoperative perforation, n (%) | NA | |||
Yes | 0 | 0 | 0 | |
No | 229 (100.0%) | 121 (100.0%) | 108 (100.0%) | |
Postoperative pathology, n (%) | 0.986 | |||
LGIN | 113 (49.3%) | 61 (50.4%) | 52 (48.1%) | |
HGIN | 64 (27.9%) | 33 (27.3%) | 31 (28.7%) | |
Intramucosal carcinoma | 39 (17.0%) | 20 (16.5%) | 19 (17.6%) | |
Submucosal carcinoma | 13 (5.7%) | 7 (5.8%) | 6 (5.6%) | |
Postoperative hospital stay, days, median (IQR) | 3.0 (2.0, 3.0) | 3.0 (2.0, 4.0) | 3.0 (2.0, 3.0) | 0.143 |
