Table 3 Multivariate analyses of the overall survival in gastric cancer patients (Cox regression model)

 Palliative gastrectomy

 (Gastrectomy vs. without gastrectomy)^a

0.689

0.540–0.879

0.003

 Tumor size

 (<5, ≥5, and <10 vs. ≥10 cm)

1.176

0.999–1.383

0.051

 Tumor location

 (Upper, middle, and lower vs. total)

1.080

0.962–1.213

0.192

 Ascite

 (With vs. without)

1.026

0.817–1.288

0.827

 Peritoneal seeding grade

 (P1 and P2 vs. P3)

1.298

1.124–1.500

< 0.001

 Serum CEA Level

 (Normal vs. elevated)

1.424

1.120–1.810

0.004

 Serum CA19-9 Level

 (Normal vs. elevated)

1.133

0.900–1.424

0.287

 Palliative chemotherapy

 (With vs. without)

0.399

0.314–0.506

< 0.001

 BMI group

 (<18.5 and 18.5–23 vs. >23)

0.812

0.686–0.962

0.016