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Table 1 Baseline characteristics between HR and RFA groups

From: Radiofrequency ablation for liver metastases in patients with gastric cancer as an alternative to hepatic resection

Characteristics

HR (N = 7) n (%)

RFA (N = 11) n (%)

P* value

Sex

 Male

5 (71.4)

10 (90.9)

0.280

 Female

2 (28.6)

1 (9.1)

 

Age

 <60

2 (28.6)

4 (36.4)

0.732

 ≥60

5 (71.4)

7 (63.6)

 

Comorbidity

 No

5 (71.4)

6 (54.5)

0.474

 Yes

2 (28.6)

5 (45.5)

 

ECOG PS

 0

7 (100)

4 (36.4)

0.026

 1

0 (0)

5 (45.5)

 

 2

0 (0)

2 (18.2)

 

Tumor location

 Upper 1/3

0 (0)

1 (9.1)

0.434

 Middle 1/3

2 (28.6)

1 (9.1)

 

 Lower 1/3

5 (71.4)

9 (81.8)

 

Differentation

 Differentiated

4 (51.7)

7 (63.6)

0.783

 Undifferentiated

3 (42.9)

4 (36.4)

 

Leuren

 Intestinal

3 (42.9)

6 (54.5)

0.629

 Diffuse&Mixed

4 (51.7)

5 (45.5)

 

Primary Tumor size

 <3 cm

1 (14.3)

1 (9.1)

0.829

 ≥3 cm

6 (85.7)

10 (90.9)

 

Lymphatic invasion

 LI (−)

3 (42.9)

1 (9.1)

0.093

 LI (+)

4 (57.1)

10 (90.9)

 

Vascular invasion

 VI (−)

4 (57.1)

8 (72.7)

0.494

 VI (+)

3 (42.9)

3 (27.3)

 

Perineural invasion

 NI (−)

4 (57.1)

8 (72.7)

0.494

 NI (+)

3 (42.9)

3 (27.3)

 

T stage

 T1-2

1 (14.3)

5 (45.5)

0.171

 T3-4

6 (85.7)

6 (54.5)

 

N stage

 N0

2 (28.6)

1 (9.1)

0.280

 N1-3

5 (71.4)

10 (90.9)

 

AJCC 7th stage

 Stage 1–2

3 (42.9)

5 (45.5)

0.914

 Stage 3-4

4 (57.1)

6 (54.5)

 

Chemotherapy

 CTx (−)

1 (14.3)

1 (9.1)

0.732

 CTx (+)

6 (85.7)

10 (90.1)

 

Number of metastatic Tumor

 Single

5 (71.4)

8 (72.7)

0.952

 Multiple

2 (28.6)

3 (27.3)

 

Size of metastatic Tumor

 <3cm

4 (42.9)

6 (54.5)

0.914

 ≥3cm

3 (57.1)

5 (45.5)

 

Lobar distribution

 Unilobar

6 (85.7)

10 (90.9)

0.732

 Bilobar

1 (14.3)

1 (9.1)

 

Pre-treatment

 Chemotherapy

   

 CTx (−)

7 (100)

7 (63.6)

0.070

 CTx (+)

0 (0)

4 (36.4)

 

Post-treatment Chemotherapy

 CTx (−)

1 (14.3)

7 (63.6)

0.040

 CTx (+)

6 (85.7)

4 (36.4)

 

Complication

 No

5 (71.4)

11 (100)

0.060

 Yes

2 (28.6)

0 (0)

 
  1. HR hepatic resection, RFA radiofrequency ablation, ECOG Eastern Cooperative Oncology Group; PS Performance Status, LI lymphatic invasion, VI venous invasion, NI perineural invasion, CTx chemotherapy
  2. *log-rank test