Table 5.
Comparison of demographic and baseline characteristics in the test set
| Lymph Node Positive group (n = 74) | Lymph Node Negative group (n = 203) | t/χ2 | P | |
|---|---|---|---|---|
| Age (years) | 60.78 ± 1.76 | 60.94 ± 2.37 | 0.584 | 0.56 |
| Female/Male | 40 (54.05%)/34 (45.95%) | 126 (62.07%)/77 (37.93%) | 1.451 | 0.228 |
| Body Mass Index (kg/m2) | 23.47 ± 1.42 | 23.45 ± 1.39 | 0.116 | 0.908 |
| Smoking history (Yes/No) | 29 (39.19%)/45 (60.81%) | 83 (40.89%)/120 (59.11%) | 0.065 | 0.799 |
| Drinking history (Yes/No) | 20 (27.03%)/54 (72.97%) | 51 (25.12%)/152 (74.88%) | 0.103 | 0.748 |
| Hypertension (Yes/No) | 13 (17.57%)/61 (82.43%) | 48 (23.65%)/155 (76.35%) | 1.167 | 0.28 |
| Diabetes (Yes/No) | 15 (20.27%)/59 (79.73%) | 47 (23.15%)/156 (76.85%) | 0.259 | 0.611 |
| Educational level (Junior college graduate/College graduate or higher) | 20 (27.03%)/54 (72.97%) | 58 (28.57%)/145 (71.43%) | 0.064 | 0.8 |
| Marital Status (Married/Unmarried) | 68 (91.89%)/6 (8.11%) | 194 (95.57%)/9 (4.43%) | 0.802 | 0.37 |
| Ethnicity (Han/Other) | 71 (95.95%)/3 (4.05%) | 187 (92.12%)/16 (7.88%) | 1.244 | 0.265 |
| Tumor length (> 2 cm/≤ 2 cm) | 55 (74.32%)/19 (25.68%) | 84 (41.38%)/119 (58.62%) | 23.545 | < 0.001 |
| Tumor location | 4.168 | 0.124 | ||
| Upper Stomach | 2 (2.7%) | 21 (10.34%) | ||
| Middle Stomach | 15 (20.27%) | 37 (18.23%) | ||
| Lower Stomach | 57 (77.03%) | 145 (71.43%) | ||
| Tumor Invasion Depth (Submucosa /Mucosa) | 61 (82.43%)/13 (17.57%) | 102 (50.25%)/101 (49.75%) | 23.198 | < 0.001 |
| Vascular Invasion (Yes/No) | 45 (60.81%)/29 (39.19%) | 104 (51.23%)/99 (48.77%) | 2.002 | 0.157 |
| Perineural Invasion (Yes/No) | 62 (83.78%)/12 (16.22%) | 109 (53.69%)/94 (46.31%) | 20.784 | < 0.001 |
| Tumor Differentiation | 6.219 | 0.045 | ||
| Poorly Differentiated | 39 (52.7%) | 94 (46.31%) | ||
| Moderately Differentiated | 26 (35.14%) | 56 (27.59%) | ||
| Well Differentiated | 9 (12.16%) | 53 (26.11%) |