Table 2. Clinicopathological features of patients included in TCGA database.

Variable	Number	Percentage
Total cases	294	100.00
Age
<65	124	42.18
≥65	170	57.82
Gender
Male	145	49.32
Female	149	50.68
Stage
Stage I	152	51.70
Stage II	71	24.15
Stage III	51	17.35
Stage IV	20	6.80
T
T1	88	29.94
T2	156	53.06
T3	25	8.50
T4	25	8.50
N
N0	186	63.27
N1	64	21.77
N2	44	14.96
M
M0	274	93.20
M1	20	6.80

TCGA, The Cancer Genome Atlas.