Table 2.
Matching factors between ESD-P and ESD-N after propensity score-matching
| ESD-P | ESD-N | P | ASD | |
|---|---|---|---|---|
| n = 41 | n = 41 | |||
| Variable-matching between groups | ||||
| Age (y), mean ± SD | 70.4 ± 9.16 | 72.9 ± 7.99 | 0.29 | 0.33 |
| Age (y), median (IQR) | 70 (65–78) | 73 (67–80) | ||
| Sex, male/female | 37/4 | 38/3 | 1 | 0.15 |
| Tumor size (mm), mean ± SD | 15.0 ± 7.16 | 15.4 ± 9.36 | 0.73 | 0.048 |
| Tumor depth, T1a/T1b | 37/4 | 36/5 | 1 | 0.078 |
| Lesion location, U/M and L | 13/28 | 13/28 | 1 | 0 |
| Histology, differentiated/undifferentiated | 39/2 | 39/2 | 1 | 0 |
| Presence of ulceration | 2 | 2 | 1 | 0 |
| Operator skill, expert/trainee | 36/5 | 36/5 | 1 | 0 |
ESD-P, endoscopic submucosal dissection of the postoperative stomach, ESD-N endoscopic submucosal dissection of the non-operative stomach, SD standard deviation, ASD absolute standardized differences, pT1a tumor invasion within the mucosa, pT1b tumor invasion in the submucosa or deeper, U upper third of the stomach, M middle third of the stomach, L lower third of the stomach
The p value was calculated using the χ2 test or Fisher exact test for the categorical data
The p value was calculated using the Mann-Whitney U test for continuous data not normally distributed