| 特征 |
| 训练集 (N = 268) | 验证集 (N = 67) | P值 |
| 年龄(年，Mean ± SD) |
| 65.44 ± 10.42 | 64.22 ± 11.01 | 0.399 |
| 性别(%) | 男 | 177 (66.0) | 47 (70.1) | 0.523 |
| 女 | 91 (34.0) | 20 (29.9) |
| |
| BMI (kg/m2, Mean ± SD) |
| 24.59 ± 3.17 | 24.26 ± 2.95 | 0.440 |
| 吸烟史(%) |
| 91 (34.0) | 29 (43.3) | 0.154 |
| 饮酒史(%) |
| 67 (25.0) | 17 (25.4) | 0.950 |
| 心血管疾病(%) |
| 95 (35.4) | 18 (26.9) | 0.184 |
| 糖尿病(%) |
| 44 (16.4) | 5 (7.5) | 0.064 |
| 手术部位(%) | 胃 | 112 (41.8) | 34 (50.7) | 0.186 |
| 肠 | 156 (50.7) | 33 (49.3) |
| |
| 新辅助放化疗(%) |
| 46 (17.2) | 14 (20.9) | 0.476 |
| 禁食时间 (天，Mean ± SD) |
| 5.23 ± 2.79 | 5.38 ± 2.55 | 0.702 |
| 首次排气时间 (天，Mean ± SD) |
| 4.62 ± 2.27 | 4.65 ± 1.51 | 0.919 |
| 留置尿管时间 (天，Mean ± SD) |
| 3.27 ± 2.58 | 3.29 ± 1.94 | 0.964 |
| 手术时间 (分钟，Mean ± SD) |
| 200.62 ± 57.97 | 213.06 ± 61.33 | 0.121 |
| 麻醉持续时间 (分钟，Mean ± SD) |
| 244.33 ± 60.46 | 257.69 ± 64.21 | 0.111 |
| 术后住院天数 (天，Mean ± SD) |
| 8.63 ± 4.76 | 8.99 ± 5.09 | 0.587 |
| 术中输血 |
| 5 (1.9) | 1 (1.5) | 0.837 |
| 肿瘤最大径 (厘米，Mean ± SD) |
| 4.12 ± 2.31 | 4.07 ± 2.18 | 0.873 |
| 淋巴结转移(%) |
| 111 (41.4) | 28 (41.8) | 0.956 |
| 血管侵犯(%) |
| 59 (22.0) | 11 (16.4) | 0.314 |
| 神经浸润(%) |
| 74 (27.6) | 17 (25.4) | 0.713 |