Mean survival time based on the N in esophageal squamous carcinoma
| N | Cases | Mean survival time (months) |
|---|---|---|
| T3N0M0 | 104 | 38 ±4 |
| T3N1M0 | 86 | 21 ±3 |
Log-Rank=0.0024
Cox proportion risk model analysis, Wald=8.510, P=0.004, which showed that N is the key factor effecting the prognosis of esophagus squamous carcinoma patients (Table 7, Fig.2).