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Table 2 Treatment outcomes before propensity score matching

From: Internal traction method using a spring-and-loop with clip (S–O clip) allows countertraction in gastric endoscopic submucosal dissection

  SLC-ESD
n = 51
C-ESD
n = 89
P value
Histology    0.695
 Adenoma 13.7 (7) 9.0 (8)
 Differentiated adenocarcinoma 82.4 (42) 86.5 (77)
 Undifferentiated adenocarcinoma 3.9 (2) 4.5 (4)
Depth    0.440
 Mucosa* 84.3 (43) 80.9 (72)
 Submucosa (< 500 μm) 9.8 (5) 6.7 (6)
 Submucosa (≧500 μm) 5.9 (3) 12.4 (11)
Presence of ulcer findings 15.7 (8) 6.7 (6) 0.141
Median procedure time, min (IQR) 40.0 (27.0–81.5) 53.0 (37.0–78.0) 0.157
Median dissection speed, mm2/min (IQR) 21.8 (13.9–32.9) 12.3 (8.2–15.5)  < 0.001
Median specimen size, mm (IQR) 38.0 (32.0–45.0) 30.0 (27.0–35.0)  < 0.001
En bloc resection 100 (51) 100 (89) NA
Complete resection 100 (51) 97.8 (87) 0.534
Post-ESD bleeding 2.0 (1) 3.4 (3) 1.000
Perforation 0 (0) 0 (0) NA
S–O clip-related factors    
 Mean S–O clip attachment time, min (SD) 2.08 (1.32) NA NA
 S–O clip slip-off 3.9 (2) NA NA
Mean number of S–O clip applications, (SD) 1.22 (0.54) NA NA
 S–O clip reattachment 17.6 (9) NA NA
 S–O clip-related damage to specimen 0 (0) NA NA
 Successful removal of anchor clip 92.2 (47) NA NA
  1. Values are % (n) unless otherwise indicated
  2. SLC-ESD spring-and-loop with clip-assisted endoscopic submucosal dissection, C-ESD conventional endoscopic submucosal dissection, SD standard deviation, IQR interquartile range, NA not applicable
  3. *Intramucosal cancers and adenomas are included in this category
  4. P < 0.05