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Table 1 Baseline characteristics of the 1046 patients who underwent ESD before propensity score-matching

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

 

ESD-P

ESD-N

p

ASD

n = 41

n = 1005

Age

  

0.83

 

 Mean ± SD

70.4 ± 9.16

71.0 ± 8.82

  

 Median (range)

70 (65–78)

72 (65–77)

 

0.834

Sex

  

0.004*

 

 Male

37 (90.2%)

706 (70.2%)

 

0.14

 Female

4 (9.8%)

299 (29.8%)

 

0.14

Lesion location

  

< 0.001*

 

 U

13 (31.7%)

157 (15.6%)

 

0.39

 M

24 (58.5%)

501 (34.5%)

 

0.50

 L

4 (9.8%)

347 (49.9%)

 

0.97

Morphology

  

0.62

 

 Protruding

16 (39.1%)

322 (32.0%)

 

0.15

 Flat

0 (0%)

11 (1.1%)

 

0.15

 Depressed

25 (61.0%)

672 (66.9%)

 

0.12

Histology

  

0.27

 

Differentiated

39 (95.1%)

981 (97.6%)

 

0.13

Undifferentiated

2 (4.9%)

24 (2.4%)

 

0.13

Lesion size (mm)

  

0.06

 

 Mean ± SD

15.0 ± 7.16

19.8 ± 13.8

 

0.44

 Median (range)

14 (4–35)

16 (2–115)

  

Specimen size (mm)

  

0.56

 

 Mean ± SD

38.7 ± 8.18

42.4 ± 15.3

 

0.30

 Median (range)

40 (16–60)

40 (15–140)

  

Depth

  

0.50

 

 pT1a

37 (90.2%)

858 (85.4%)

 

0.15

 pT1b

4 (9.8%)

147 (14.6%)

 

0.15

Ulcer (scar)

  

0.76

 

 Presence

2 (4.9%)

80 (8.0%)

 

0.12

 Absence

39 (95.1%)

921 (92.0%)

 

0.12

Suture line or anastomotic site

  

–

 

 Involving

19 (%)

–

 

–

 Not involving

22 (%)

–

 

–

Skill level

  

< 0.001*

 

 Expert

36 (87.8%)

623 (62.0%)

 

0.62

 Trainee

5 (12.2%)

382 (38.0%)

 

0.62

  1. ESD endoscopic submucosal dissection, SD standard deviation, ASD absolute standardized differences, U upper third of the stomach, M middle third of the stomach, L lower third of the stomach, pT1a tumor invasion within the mucosa, pT1b tumor invasion in the submucosa or deeper
  2. The p value was calculated using the χ2 test or Fisher exact test for categorical data
  3. The p value was calculated using the Mann-Whitney U test for continuous data not normally distributed
  4. *Significant