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Table 1 Clinical characteristics of HCC patients (SEER 2010–2015)

From: Identifying hepatocellular carcinoma patients with survival benefits from surgery combined with chemotherapy: based on machine learning model

Baseline variables

Training cohort (N = 1300)

Internal testing cohort

(N = 325)

P

Vascular invasion

  

0.683a

 No

1047

265

 

 Yes

253

60

 

Tumor size (cm)

  

0.444a

 < 2 cm

136

42

 

 2–5 cm

625

151

 

 > 5 cm

539

132

 

AFP

  

0.96a

 Negative

558

139

 

 Positive

742

186

 

Marital status

  

0.76a

 Married

796

196

 

 Others

504

129

 

Lesion

  

0.528a

 Single

1106

281

 

 Multiple

194

44

 

Grade

  

0.884a

 Well

307

73

 

 Moderately

679

168

 

 Poorly

283

77

 

 Undifferentiated

31

7

 

Chemotherapy

  

0.613a

 No

1153

285

 

 Yes

147

40

 

Age at diagnosis

  

0.532a

 18–45

85

16

 

 46–65

704

176

 

 > 65

511

133

 

AJCC_T

  

0.64a

 1

895

229

 

 2

310

77

 

 3

95

19

 

Gender

  

0.079a

 Women

360

106

 

 Man

940

219

 

Race

  

0.003b

 American Indian/Alaska Native

10

8

 

 Asian or Pacific Islander

514

123

 

 Black

222

41

 

 White

871

153

 

5-year CSD

  

0.006a

No

974

267

 

Yes

326

58

 
  1. AFP, α-fetoprotein
  2. aPearson’s χ2 test
  3. blikelihood ratio