Table 2 Univariate and multivariate analysis of variables affecting RFS

Age (>63.5 years)

1.84 (0.74-4.63)

0.19

Sex

Female

1 (reference)

Male

0.77 (0.24-2.38)

0.651

Operative method

Open

1 (reference)

1 (reference)

Laparoscopy

1.95 (0.78-4.87)

0.152

4.68 (1.61-13.61)

0.005

Intent to treat

Palliative

1 (reference)

Cure

0.58 (0.23-1.49)

0.265

Synchronous metastasis

1.95 (0.72-5.26)

0.186

Site of metastasis

Single

1 (reference)

Both

0.74 (0.15-3.56)

0.714

Adrenal + other site

1.02 (0.39-2.60)

0.967

Site of primary tumor

Other

1 (reference)

Liver

0.51 (0.11-2.24)

0.373

Stomach

0.15 (0.01-1.45)

0.103

Kidney

0.63 (0.11-3.58)

0.604

Lung

1.68 (0.57-4.94)

0.346

Previous metastasectomy

No

1 (reference)

Yes

0.33 (0.04-2.55)

0.294

C-reactive protein (mg/dl)

≤1.0

1 (reference)

>1

7.55 (1.69-33.6)

0.008

Albumin (g/dl)

≥3.5

1 (reference)

<3.5

2.03 (0.83-4.93)

0.118

GPS

0

1 (reference)

1 (reference)

1

2.82 (0.73-10.9)

0.132

2.77 (0.61-12.69)

0.189

2

6.47 (1.64-25.3)

0.007

11.80 (2.50-55.70)

0.002

ECOG-PS

0-1

1 (reference)

2

2.03 (0.65-6.32)

0.222