Table 1. Basic clinical features of patients from TCGA dataset.

Features	N	%
Age
<60	120	29.5
≥60	284	69.8
Unknown	3	0.7
Sex
Female	146	35.9
Male	261	64.1
Stage
I	53	13
II	122	30
III	166	40.8
IV	41	10.1
Unknown	25	6.1
Histology
Adenocarcinoma	305	74.9
Mucinous	20	4.9
Signet ring cell carcinoma	13	3.2
Diffuse type	69	17
Grade
G1/G2	155	38.1
G3	243	59.7
Unknown	9	2.2

TCGA, The Cancer Genome Atlas.