Table 4 Baseline characteristics of patients with EGC and their difference in terms of depth of invasion following ESD procedure
Patient Parameters | All EGCs lesions (n = 162) [No. (%)] | Mucosal lesion (n = 132) [No. (%)] | Submucosal (n = 30) [No. (%)] | p*-value |
|---|---|---|---|---|
Mean age in years (±SD) | 61.10 (± 8.76) | 60.33 (± 8.38) | 64.53 (± 9.70) | 0.563 |
Gender | Â | Â | Â | 0.981 |
 Female | 42 (25.9) | 34 (25.8) | 8 (26.7) |  |
 Male | 120 (74.1) | 98 (74.2) | 22 (73.3) |  |
Tumor location |  |  |  | <  0.001 |
 Lower third | 95 (58.6) | 89 (67.4) | 6 (20.0) |  |
 Middle or Upper third | 67 (41.4) | 43 (32.6) | 24 (80.0) |  |
Gross tumor type | Â | Â | Â | 0.013 |
 Group 1 | 46 (28.4) | 43 (32.6) | 3 (10.0) |  |
 Group 2 | 116 (71.6) | 89 (67.4) | 27 (90.0) |  |
Ulceration status | Â | Â | Â | 0.001 |
 Absent | 135 (83.3) | 116 (87.9) | 19 (63.3) |  |
 Present | 27 (16.7) | 16 (12.1) | 11 (36.7) |  |
Size of tumor in | Â | Â | Â | 0.001 |
 ≤2 cm | 111 (68.5) | 98 (74.2) | 13 (43.3) |  |
 > 2 cm | 51 (31.5) | 34 (25.8) | 17 (56.7) |  |
Differentiation |  |  |  | <  0.001 |
 Differentiated | 129 (79.6) | 114 (86.4) | 15 (50.0) |  |
 Undifferentiated | 33 (20.4) | 18 (13.6) | 15 (50.0) |  |
Horizontal margin | Â | Â | Â | 0.088 |
 Negative | 159 (98.1) | 131 (99.2) | 28 (91.7) |  |
 Positive | 3 (1.9) | 1 (0.8) | 2 (8.3) |  |
Vertical margin | Â | Â | Â | 0.001 |
 Negative | 158 (97.5) | 132 (100) | 26 (86.7) |  |
 Positive | 4 (2.5) | 0 (0.0) | 4 (13.3) |  |
Lympho-vascular invasion |  |  |  | <  0.001 |
 Absent | 159 (98.1) | 132 (100) | 27 (90.0) |  |
 Present | 3 (1.9) | 0 (0.0) | 3 (10.0) |  |