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| Characteristic (pvalue of Chi-2 Pearson test) | Adenocarcinomas | Squamous cell carcinomas | |
|---|---|---|---|
| T stage (0.5816) | T1 | 8 | 3 |
| T2 | 15 | 7 | |
| T3 | 3 | 3 | |
| T4 | 2 | 0 | |
| N stage (0.8856) | N0 | 8 | 9 |
| N+ | 20 | 4 | |
| Differentiation (0.9438) | Well | 15 | 7 |
| Moderately or poorly | 4 | 2 | |
| N/A | 9 | 4 | |
| Presence of necrosis (0.0018) | Yes | 13 | 0 |
| No | 13 | 13 | |
| N/A | 2 | 0 | |
N/A: not available.
Pvalues in bold are lower than 5%.
