Table 3 Summary of the results of the survival analysis (log-rank test). Overall, the gastric resection group showed a longer survival time. However, gastric resection provided no survival benefit for patients who have distant lymph node or liver metastasis, non-tubular adenocarcinoma, or did not undergo postoperative chemotherapy

• Entirely

1.9 (n = 43)

0.9 (n = 28)

<0.01

• Incurable factors

  P(+) and/or CY (+), LN(−)H(−)

2.6 (n = 34)

0.8 (n = 21)

<0.01

  P(−)CY(−), LN (+) or H (+)

1.7 (n = 7)

1.6 (n = 5)

0.527

• Histological classifications

  Tubular adenocarcinoma

1.9 (n = 16)

0.6 (n = 10)

0.042

  Poorly differentiated adenocarcinoma

2.6 (n = 28)

1.0 (n = 18)

0.318

  Signet cell adenocarcinoma

1.4 (n = 5)

0.8 (n = 6)

0.070

• Postoperative chemotherapy

  Chemotherapy (+)

3.0 (n = 36)

0.9 (n = 21)

<0.01

  Chemotherapy (−)

0.7 (n = 8)

0.2 (n = 7)

0.589