Table 1 Baseline characteristics between ESD and surgery groups.
ESD group (n = 241) | Surgery group (n = 241) | P value | |
|---|---|---|---|
Age (years), mean ± SD | |||
At enrollment | 64.4 ± 9.2 | 58.2 ± 10.8 | <0.001 |
At treatment | 62.2 ± 9.4 | 55.7 ± 10.9 | <0.001 |
Sex, n (%) | 0.565 | ||
Men | 162 (67.2) | 155 (64.3) | |
Women | 79 (32.8) | 86 (35.7) | |
Histology, n (%) | <0.001 | ||
Differentiated | 228 (94.6) | 108 (44.8) | |
Undifferentiated | 13 (5.4) | 133 (55.2) | |
Tumor size (mm) | 15.6 ± 12.8 | 23.9 ± 16.1 | <0.001 |
Invasion depth, n (%) | <0.001 | ||
Mucosa | 225 (93.4) | 163 (67.6) | |
Submucosal | 16 (6.6) | 78 (32.4) | |
Adverse event after treatment, n (%) | 0.015a | ||
Early | 16 (6.6) | 5 (2.1) | |
Late | 1 (0.4) | 0 | |
Elapse time since ESD or surgery, mean ± SD (year) | 2.1 ± 1.5 | 2.5 ± 1.6 | 0.011 |
3 month–1 year, n (%) | 76 (31.5) | 68 (28.2) | 0.274 |
1–2 years, n (%) | 52 (21.6) | 39 (16.2) | |
2–3 years, n (%) | 42 (17.4) | 43 (17.8) | |
3–4 years, n (%) | 40 (16.6) | 47 (19.5) | |
4–5 years, n (%) | 31 (12.9) | 44 (18.3) | |
Resection type | |||
Distal gastrectomy | — | 238 (98.8) | |
Proximal gastrectomy | — | 3 (1.2) |
