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Table 4 Tumor factors involving long procedure times for ESD-P

From: Propensity score-matching analysis to compare clinical outcomes of endoscopic submucosal dissection for early gastric cancer in the postoperative and non-operative stomachs

  Long procedure time Shorter procedure time P
n = 30 n = 11
Previous surgery type, (%)    0.412
 Distal gastrectomy 20 (66.7%) 7 (63.6%)  
 Proximal gastrectomy 3 (10.0%) 2 (18.2%)  
 Pylorus preserving gastrectomy 0 (0%) 1 (9.1%)  
 Esophagectomy 7 (23.3%) 1 (9.1%)  
Tumor size, n (%)    0.651
  < 21 24 (80%) 10 (90.9%)  
  ≥ 21 6 (20%) 1 (9.1%)  
Tumor depth, n (%)    0.559
 T1a 26 (86.7%) 11 (100%)  
 T1b 4 (13.3%) 0 (0%)  
Lesion location, n (%)    0.719
 Upper 9 (30.0%) 4 (36.4%)  
 Middle or lower 21 (70.0%) 7 (63.6%)  
Suture line or anastomotic site, n (%)    0.038*
 Involved 17 (56.7%) 2 (18.2%)  
 Not involved 13 (43.4%) 9 (81.8%)  
Morphology, n (%)    0.287
 Flat or depressed 20 (66.7%) 5 (45.5%)  
 Protruding 10 (33.3%) 6 (54.5%)  
Histology, n (%)    1
 Differentiated 28 (93.3%) 11 (100%)  
 Undifferentiated 2 (6.7%) 0 (0%)  
Ulceration (scar)    1
 Presence 2 (6.7%) 0 (0%)  
 Absence 28 (93.3%) 11 (100%)  
  1. ESD-P endoscopic submucosal dissection for early gastric cancer in the postoperative stomach
  2. The p value was calculated using the χ2 test or the Fisher exact test for categorical data
  3. *Significant