Table 1.
Basic Characteristics of Patients
| Training Cohort (N=617) | Validation Cohort (284) | |||||
|---|---|---|---|---|---|---|
| ≤60 (N=350) | >60 (N=267) | P value | ≤60 (N=165) | >60 (N=119) | P value | |
| Sex | 0.090 | 0.459 | ||||
| Male | 246 (70.3) | 204 (76.4) | 123 (74.5) | 84 (70.6) | ||
| Female | 104 (29.7) | 63 (23.6) | 42 (25.5) | 35 (29.4) | ||
| BMI, median | 22.84 | 22.95 | 0.230 | 23.31 | 22.64 | 0.038 |
| Tumor location | 0.119 | 0.866 | ||||
| Upper third | 33 (9.4) | 41 (15.4) | 19 (11.5) | 11 (9.2) | ||
| Middle third | 54 (15.4) | 32 (12.0) | 24 (14.5) | 20 (16.8) | ||
| Lower third | 255 (72.9) | 188 (70.4) | 119 (72.1) | 85 (71.4) | ||
| Total stomach | 8 (2.3) | 6 (2.2) | 3 (1.8) | 3 (2.5) | ||
| Tumor size (mm) | 0.001 | 0.319 | ||||
| ≤50 | 257 (73.4) | 163 (61.0) | 108 (65.5) | 71 (59.7) | ||
| >50 | 93 (26.6) | 104 (39.0) | 57 (34.5) | 48 (40.3) | ||
| pTNM | 0.004 | 0.376 | ||||
| I | 149 (42.6) | 81 (30.3) | 63 (38.2) | 36 (30.3) | ||
| II | 96 (27.4) | 100 (37.5) | 47 (28.5) | 37 (31.1) | ||
| III | 105 (30.0) | 86 (32.2) | 55 (33.3) | 46 (38.7) | ||
| Nerve infiltration | 0.057 | 0.499 | ||||
| No | 187 (53.4) | 122 (45.7) | 76 (46.1) | 50 (42.0) | ||
| Yes | 163 (46.6) | 145 (54.3) | 89 (53.9) | 69 (58.0) | ||
| Venous invasion | 0.122 | 0.030 | ||||
| No | 246 (70.3) | 172 (64.4) | 95 (57.6) | 53 (44.5) | ||
| Yes | 104 (29.7) | 95 (35.6) | 70 (42.4) | 66 (55.5) | ||
| Postoperative chemotherapy | <0.001 | 0.002 | ||||
| No | 183 (52.3) | 177 (66.3) | 85 (51.5) | 83 (69.7) | ||
| Yes | 167 (47.7) | 90 (33.7) | 80 (48.5) | 36 (30.3) | ||