Total(n = 338) | m-EMR(n = 79) | ESD(n = 259) | P value | |
---|---|---|---|---|
Patient Characteristics | ||||
Age, y | 0.376 | |||
Mean ± SD | 49.49 ± 10.8 | 50.4 ± 11.1 | 49.2 ± 10.7 | |
Median (range) | 49(15–80) | 49(16–77) | 49(15–80) | |
Sex, n (%) | 0.762 | |||
Male | 206(60.9%) | 47(59.5%) | 159 (61.4%) | |
Female | 132(39.1%) | 32(40.5%) | 100 (38.6%) | |
Tumor Characteristics | ||||
Lesion size, mm | 0.004* | |||
Mean ± SD | 6.8 ± 2.9 | 5.8 ± 1.9 | 7.1 ± 3.1 | |
Median (range) | 6.0(2–18) | 6.0 (2–10) | 6.0 (2–18) | |
Lesion size group, n (%) | 0.011* | |||
< 10 mm | 275(81.4%) | 72(91.1%) | 203(78.4%) | |
≥ 10 mm | 63(18.6%) | 7(8.9%) | 56(21.6%) | |
Location, n(%) | ||||
Upper | 22(6.5%) | 6(7.6%) | 16(6.2%) | 0.552 |
Middle | 170(50.3%) | 43(54.4%) | 127(49.0%) | |
Lower | 146(43.2%) | 30(38.0%) | 116(44.8%) | |
Histopathological grade, n (%) | 0.681 | |||
Grade 1 | 286(84.6%) | 68(86.1%) | 218(84.2%) | |
Grade 2 | 52(15.4%) | 11(13.9%) | 41(15.8%) | |
Invasion layer, n (%) | 0.636 | |||
Mucosal | 75(22.2%) | 16(20.3%) | 59(22.8%) | |
Submucosal | 263(77.8%) | 63(79.7%) | 200(77.2%) | |
Endoscopic morphology, n (%) | ||||
Ia | 39(11.5%) | 6(7.6%) | 33(12.7%) | 0.146 |
Ib | 230(68.1%) | 59(74.7%) | 171(66.0%) | |
II | 51(15.1%) | 13(16.4%) | 38(14.7%) | |
III | 18(5.3%) | 1(1.3%) | 17(6.6%) | |
Outcomes | ||||
Procedure time, min | 0.000* | |||
Mean ± SD | 15.3 ± 9.4 | 9.1 ± 4.4 | 17.2 ± 9.7 | |
Median (range) | 12.0 (3–56) | 8.0 (3–26) | 15.0(4–56) | |
En bloc resection, n (%) | 334(98.8%) | 78 (98.7%) | 256 (98.8%) | 1.000 |
Complete resection(R0), n (%) | 310(91.7%) | 72(91.1%) | 238(91.9%) | 0.832 |
Procedure-related adverse events, n (%) | 9(2.7%) | 2(2.6%) | 7(2.7%) | 0.572 |
Postprocedural bleeding | 7(2.1%) | 1(1.3%) | 6(2.3%) | |
Perforation | 2(0.6%) | 1(1.3%) | 1(0.4%) | |
Operation involving incomplete resectiona, n (%) | 7(2.1%) | 1(1.3%) | 6(2.3%) | 0.902 |