Characteristics	Group	Total	%
Age	≤65	163	48.22
Age	>65	175	51.78
Gender	Male	168	49.70
Gender	Female	170	50.30
T Stage	T1	103	30.47
	T2	189	55.92
	T3	28	8.28
	T4	18	5.33
N Stage	N0	213	63.02
N Stage	N1,2,3	125	36.98
M Stage	M0	316	93.49
M Stage	M1	22	6.51
Clinc Stage	I	173	51.18
	II	81	23.96
	III	62	18.34
	IV	22	6.51