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Comparison of the internal survival rate of TNM staging system (the degree of differentiation and single trend).
| TNM staging system (n) | Median survival in months (95% CI) | P value |
|---|---|---|
| I (22) | 49.3 (37.8–60.8) | <.001*** |
| II (57) | 20.5 (16.8–24.2) | .173 |
| III (56) | 15.0 (12.6–17.4) | .006** |
| IV (47) | 10.0 (7.3–12.7) |
P < .01,
P < .001.
