Table 3.

The predictive ability of prognostic factors for CSS and OS in esophagus cancer.

c-index	All	T1	T2	T3	T4
OS
Tumor size	0.550	0.604	0.572	0.512	0.513
Age	0.522	0.537	0.566	0.514	0.519
Sex	0.500	0.510	0.502	0.509	0.501
Grade	0.524	0.544	0.544	0.506	0.514
T stage	0.549	NA	NA	NA	NA
N stage	0.559	0.585	0.618	0.546	0.524
M stage	0.551	0.568	0.561	0.523	0.526
Surgery	0.565	0.62	0.623	0.528	0.524
CSS
Tumor size	0.563	0.63	0.589	0.519	0.514
Age	0.513	0.523	0.557	0.507	0.514
Sex	0.502	0.509	0.502	0.51	0.505
Grade	0.531	0.555	0.539	0.509	0.518
T stage	0.561	NA	NA	NA	NA
N stage	0.566	0.598	0.629	0.551	0.529
M stage	0.565	0.592	0.572	0.53	0.532
Surgery	0.574	0.641	0.629	0.532	0.528