Table 1.
Clinicopathological characteristics of patients with gastric cancer in primary cohort and validation cohort.
| Characteristic | Primary cohort (n=442) | Validation cohort (n=152) | ||
|---|---|---|---|---|
| No. of patients | % | No. of patients | % | |
| Sex | ||||
| Male | 295 | 66.7 | 115 | 75.7 |
| Female | 147 | 33.3 | 37 | 24.3 |
| Age | ||||
| ≤60 | 304 | 68.8 | 97 | 63.8 |
| >60 | 138 | 31.2 | 55 | 36.2 |
| Tumor location | ||||
| Upper | 74 | 16.7 | 15 | 9.9 |
| Middle | 173 | 39.1 | 50 | 32.9 |
| Lower | 195 | 44.1 | 87 | 57.2 |
| Histological grade | ||||
| Well or moderately differentiated | 205 | 46.4 | 91 | 59.9 |
| Poorly or not differentiated | 237 | 53.6 | 61 | 40.1 |
| Lauren type | ||||
| Diffuse | 73 | 16.5 | 33 | 21.7 |
| Intestinal | 198 | 44.8 | 65 | 42.8 |
| Mixed | 171 | 38.7 | 54 | 35.5 |
| Tumor size | ||||
| ≤5 | 183 | 41.4 | 70 | 46.1 |
| >5 | 259 | 58.6 | 82 | 53.9 |
| Lymphovascular invasion | ||||
| No | 323 | 73.1 | 91 | 59.9 |
| Yes | 119 | 26.9 | 61 | 40.1 |
| Perineural invasion | ||||
| No | 258 | 58.4 | 102 | 67.1 |
| Yes | 184 | 41.6 | 50 | 32.9 |
| TNM stage (AJCC, 8th) | ||||
| I | 101 | 22.9 | 42 | 27.6 |
| II | 136 | 30.8 | 77 | 50.7 |
| III | 205 | 46.4 | 33 | 21.7 |
| Adjuvant chemotherapy | ||||
| No | 177 | 40.0 | 57 | 37.5 |
| Yes | 265 | 60.0 | 95 | 62.5 |