Table 5.
Comparison of features between the training and validation sets, n (%)
|
Characteristic
|
Test (n = 90)
|
Train (n = 210)
|
χ
2
|
P value
|
| Age, years | 1.94 | 0.164 | ||
| < 60 | 46 (51.11) | 89 (42.38) | ||
| ≥ 60 | 44 (48.89) | 121 (57.62) | ||
| Sex | 0.43 | 0.512 | ||
| Female | 43 (47.78) | 109 (51.90) | ||
| Male | 47 (52.22) | 101 (48.10) | ||
| BMI, kg/m2 | 0.21 | 0.646 | ||
| < 25 | 69 (76.67) | 166 (79.05) | ||
| ≥ 25 | 21 (23.33) | 44 (20.95) | ||
| TyG | 0.31 | 0.578 | ||
| Low | 47 (52.22) | 117 (55.71) | ||
| High | 43 (47.78) | 93 (44.29) | ||
| Drinking history | 0.24 | 0.627 | ||
| No | 63 (70.00) | 141 (67.14) | ||
| Yes | 27 (30.00) | 69 (32.86) | ||
| Smoking history | 1.58 | 0.209 | ||
| No | 67 (74.44) | 141 (67.14) | ||
| Yes | 23 (25.56) | 69 (32.86) | ||
| ECOG | 0.41 | 0.523 | ||
| 0 | 57 (63.33) | 141 (67.14) | ||
| 1 | 33 (36.67) | 69 (32.86) | ||
| Site | 0.08 | 0.772 | ||
| Stomach | 44 (48.89) | 106 (50.72) | ||
| Gastric and esophageal binding | 46 (51.11) | 103 (49.28) | ||
| Histological | 1.39 | 0.239 | ||
| Adenocarcinoma | 21 (23.33) | 63 (30.00) | ||
| Other | 69 (76.67) | 147 (70.00) | ||
| CEA, ng/mL | 3.70 | 0.054 | ||
| < 3 | 34 (37.78) | 56 (26.67) | ||
| ≥ 3 | 56 (62.22) | 154 (73.33) | ||
| AFP, ng/mL | 1.83 | 0.176 | ||
| < 15 | 72 (80.00) | 181 (86.19) | ||
| ≥ 15 | 18 (20.00) | 29 (13.81) | ||
| CA-199, ng/mL | 1.54 | 0.214 | ||
| < 37 | 60 (66.67) | 124 (59.05) | ||
| ≥ 37 | 30 (33.33) | 86 (40.95) | ||
| Liver metastasis | 1.60 | 0.206 | ||
| No | 63 (70.00) | 131 (62.38) | ||
| Yes | 27 (30.00) | 79 (37.62) | ||
| Peritoneal metastasis | 0.73 | 0.392 | ||
| No | 75 (83.33) | 166 (62.38) | ||
| Yes | 15 (16.67) | 79 (37.62) | ||
| EBV status | 0.10 | 0.578 | ||
| No-infect | 75 (83.33) | 178 (84.76) | ||
| Infect | 15 (16.67) | 32 (15.24) | ||
| PD-L1 expression | 0.60 | 0.440 | ||
| CPS < 5 | 13 (14.44) | 38 (18.10) | ||
| CPS ≥ 5 | 77 (85.56) | 172 (81.90) | ||
| MMR status | 0.02 | 0.893 | ||
| pMMR | 4 (4.44) | 7 (3.33) | ||
| dMMR | 86 (95.56) | 203 (96.67) |
BMI: Body mass index; TyG: Triglyceride glucose; ECOG: Eastern Cooperative Oncology Group; CEA: Carcinoembryonic-antigen; AFP: Alpha-fetoprotein: CA-199: Carbohydrate antigen 199; EBV: Epstein-Barr virus; PD-L1: Programmed cell death ligand 1; CPS: Combined positive score; MMR: Mismatch repair; pMMR: Proficient mismatch repair; dMMR: Deficient mismatch repair.