Table 1 Basic information of the patients

Age (years), Median (IQR)

61.5 (58.2–65.3)

63.2 (59.4–65.5)

62.5 (58.1–66.3)

Gender

 > 0.1

 Male

6

8

6

 Female

2

8

10

BMI(kg/m²), Median (IQR)

20.5 (18.1–22.5)

19.5 (17.8–21.8)

20.0 (19.2–23.0)

Comorbidity

 > 0.1

 No

2

7

8

 Yes

6

9

8

ECOG performance status

 > 0.1

 0

4

4

6

 1

4

10

9

 2

0

2

1

Child–Pugh class

 > 0.1

 Grade A

7

13

11

 Grade B

1

3

5

Liver metastases

 > 0.1

 Synchronous

2

1

1

 Metachronous

6

15

15

First-line treatment of liver metastases

NA

 Chemotherapy

2

–

16

 RFA

2

–

0

 HIFU + TACE

2

–

0

 HIFU

2

–

0

Chemotherapy before surgery

0.09

 No

6

16

15

 Yes

2

0

1

TNM stage of GC

 > 0.1

 I

1

4

2

 II

1

3

4

 III

4

8

9

 IV

2

1

1

Number of lymph nodes retrieved, Median (IQR)

19 (12–26)

18 (12–27)

20 (13–25)