Table 1.

Baseline information of enrolled patients.

Features		Numbers	Percentage (%)
Age	<= 65	241	46.2%
	> 65	262	50.2%
	Unknown	19	3.6%
Gender	Female	280	53.6%
	Male	242	46.4%
Stage	Stage I	279	53.4%
	Stage II	124	23.8%
	Stage III	85	16.3%
	Stage IV	26	5.0%
	Unknown	8	1.5%
T-stage	T1	172	33.0%
	T2	281	53.8%
	T3	47	9.0%
	T4	19	3.6%
	Unknown	3	0.6%
M-stage	M0	353	67.6%
	M1	25	4.8%
	Unknown	144	27.6%
N-stage	N0	335	64.2%
	N1	98	18.8%
	N2	75	14.4%
	N3	2	0.4%
	Unknown	12	2.3%