Table 5. Comparison of feature E between different nodal staging.
| χ2 | P value | ||
|---|---|---|---|
| N0 | N1 | 5.701 | 0.017 |
| N2 | 6.164 | 0.013 | |
| N3 | 0.316 | 0.574 | |
| N1 | N2 | 0.379 | 0.538 |
| N3 | 0.613 | 0.434 | |
| N2 | N3 | 1.306 | 0.253 |
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