Table 2 The chi-square test of the relation between risk score and clinical features in ICGC and GSE14520 cohort

Survival status

0.04

0.04

 Survived

43

146

12

134

 Died

16

26

16

80

Age

0.63

0.17

 ≥ 60 years

49

138

3

47

 < 60 years

10

34

25

167

Sex

0.84

0.12

 Male

44

126

27

184

 Female

15

46

1

30

Stage

< 0.001

0.08

 I–II

25

116

18

156

 III–IV

34

56

10

41

 x

0

0

0

17

Histological grade

< 0.01

 G1–2

30

128

 G3–4

21

33

 Gx

8

11

Cirrhosis status

0.37

 No cirrhosis

1

18

 Cirrhosis

27

196

Recurrence status

0.19

 No recurrence

9

97

 Recurrence

19

117

Hepatitis status

0.23

 Hepatitis B

27

191

 No hepatitis

1

23