Table 1.
Baseline characteristics.
| Total (n = 376) | |
|---|---|
| Age, years, mean (SD) | 60.2 (12.1) |
| Male gender, n (%) | 199 (52.9) |
| Tumor location, n (%) | |
| Lower third | 143 (38.0) |
| Middle third | 194 (51.6) |
| Upper third | 39 (10.4) |
| Lesion size, mm, mean (SD) | 32.4 (19.7) |
| Signet ring cell type, n (%) | 233 (62.0) |
| Atrophic gastritis, n (%) | |
| Mild | 118 (31.4) |
| Moderate | 207 (55.1) |
| Severe | 51 (13.6) |
| Gross type, n (%) | |
| Elevated | 26 (6.9) |
| Flat | 61 (16.2) |
| Depressed | 289 (76.9) |
| Surface configuration, n (%) | |
| Excavated ulceration | 151 (40.2) |
| Scar deformity | 155 (41.2) |
| Ulcer-related findings | 246 (65.4) |
| Erythema | 350 (93.1) |
| Discoloration | 91 (24.2) |
| Nodularity | 85 (22.6) |
| Depression | 127 (33.8) |
| Erosion | 124 (33.0) |
| Pathologic factors | |
| Submucosal invasion, n (%) | 158 (42.0) |
| Lymphovascular invasion, n (%) | 28 (7.4) |
| Perineural invasion, n (%) | 22 (5.9) |
| Depth of invasion Signet ring cell type: M1/M2/SM1/deep SM, n (%) | 93/64/10/66 |
| (39.9/27.5/4.3/28.3) | |
| Poorly differentiated type: M1/M2/SM1/deep SM, n (%) | 31/30/11/71 |
| (21.7/21.0/7.7/49.6) | |
| Within expanded indication, n (%) | 59 (15.7) |
| Lymph node metastasis, n (%) | 37 (9.8) |
SD, standard deviation; SM, submucosa; M1, lamina propria; M2, muscularis mucosa; SM1, <500 μm from the muscularis mucosa; deep SM, >500 μm from the muscularis mucosa.