Table I.

Patient clinical information and features (n=608).

Group	n	Proportion (%)
Age
<60	177	29.1
≥60	431	70.9
Sex
Female	280	46.1
Male	328	53.9
M stage
M0	450	74.0
M1	85	14.0
MX	63	10.4
NA	10	1.6
N stage
N0	345	56.7
N1	147	24.2
N2	112	18.4
NA	2	0.3
NX	2	0.3
T stage
T1	20	3.3
T2	106	17.4
T3	414	68.1
T4	65	10.7
Missing	3	0.5
Pathologic stage
I	106	17.4
II	220	36.2
III	175	28.8
IV	86	14.1
NA	21	3.5

T, tumor; N, node; M, metastasis; NA, not available.