Table 2. Correlation between Claudin-18 expression and clinicopathological features.
| Features | High expression (n=27) | Low expression (n=36) | χ2 | P |
|---|---|---|---|---|
| Age (n) | ||||
| <65 years | 12 | 20 | 0.762 | 0.383 |
| ≥65 years | 15 | 16 | ||
| Gender (n) | 1.500 | 0.221 | ||
| Male | 23 | 26 | ||
| Female | 4 | 10 | ||
| Vascular invasion (n) | 2.617 | 0.106 | ||
| Positive | 3 | 10 | ||
| Negative | 24 | 26 | ||
| Nerve invasion (n) | 4.321 | 0.038 | ||
| Positive | 1 | 8 | ||
| Negative | 26 | 28 | ||
| Clinical stage (n) | 0.005 | 0.941 | ||
| I–II | 11 | 15 | ||
| III–IV | 16 | 21 | ||
| Tumor size (n) | 0.253 | 0.608 | ||
| <5 cm | 13 | 15 | ||
| ≥5 cm | 14 | 21 | ||
| Total count of lymph nodes (n) | 1.561 | 0.212 | ||
| <15 | 13 | 23 | ||
| ≥15 | 14 | 13 | ||
| Positive count of lymph nodes (n) | 0.964 | 0.326 | ||
| <6 | 19 | 21 | ||
| ≥6 | 8 | 15 |