Table 1 Comparison of preoperative demographic and baseline characteristics between the two groups.
Characteristics | Overall (n = 229) | Dual knife group (n = 121) | Injection mucosa knife group (n = 108) | P-value |
|---|---|---|---|---|
Sex, n (%) | 0.716 | |||
Male | 128 (55.9%) | 69 (57.0%) | 59 (54.6%) | |
Female | 101 (44.1%) | 52 (43.0%) | 49 (45.4%) | |
Age, years, n (%) | 0.497 | |||
< 60 | 88 (38.4%) | 44 (36.4%) | 44 (40.7%) | |
≥ 60 | 141 (61.6%) | 77 (63.6%) | 64 (59.3%) | |
Underlying diseases, n (%) | 0.112 | |||
Yes | 80 (34.9%) | 48 (39.7%) | 32 (29.6%) | |
No | 149 (65.1%) | 73 (60.3%) | 76 (70.4%) | |
Anticoagulant or antiplatelet drugs, n (%) | 0.946 | |||
Yes | 23 (10.0%) | 12 (9.9%) | 11 (10.2%) | |
No | 206 (90.0%) | 109 (90.1%) | 97 (89.8%) | |
Tumor location, n (%) | 0.771 | |||
Anterior wall | 48 (21.0%) | 27 (22.3%) | 21 (19.4%) | |
Posterior wall | 61 (26.6%) | 34 (28.1%) | 27 (25.0%) | |
Left lateral wall | 69 (30.1%) | 36 (29.8%) | 33 (30.6%) | |
Right lateral wall | 51 (22.3%) | 24 (19.8%) | 27 (25.0%) | |
Distance to dentate line, cm, n (%) | 0.836 | |||
< 5.0 | 150 (65.5%) | 80 (66.1%) | 70 (64.8%) | |
≥ 5.0 | 79 (34.5%) | 41 (33.9%) | 38 (35.2%) | |
Endoscopic morphology, n (%) | 0.998 | |||
LST-G-H | 49 (21.4%) | 26 (21.5%) | 23 (21.3%) | |
LST-G-M | 111 (48.5%) | 58 (47.9%) | 53 (49.1%) | |
LST-NG-F | 56 (24.5%) | 30 (24.8%) | 26 (24.1%) | |
LST-NG-PD | 13 (5.7%) | 7 (5.8%) | 6 (5.6%) | |
Tumor size, cm, median (IQR) | 2.3 (2.0, 3.1) | 2.3 (1.9, 2.9) | 2.3 (2.0, 3.2) | 0.084 |
Tumor area, cm², median (IQR) | 4.2 (3.1, 7.5) | 4.2 (2.8, 6.6) | 4.2 (3.1, 8.0) | 0.084 |
