Table 2.

Cox proportional hazard model based on the uni- and multivariate analyses to determine the independent factors for the overall survival (OS). For the univariate analysis, we selected tubular adenocarcinoma, gastric resection, and postoperative chemotherapy as independent factors affecting the OS. Similarly, for the multivariate analysis, we selected volume reduction and postoperative chemotherapy as independent factors associated with OS

Univariate analysis	Hazard ratio	95 % CI	p value
Male	0.976	0.518–1.944	0.941
Age ≥ 68	1.070	0.584–1.954	0.825
PS ≥ 2	2.329	0.990–4.881	0.053
ASA-PS ≥ 2	1.156	0.623–2.179	0.648
Tubular adenocarcinoma	0.483	0.231–0.935	0.030
P(+) and/or CY (+)	0.886	0.448–1.913	0.744
LN(+) or H(+)	0.970	0.476–1.851	0.928
Non-curative gastric resection	0.326	0.172–0.614	<0.01
Complications (Clavian-Dindo ≥ 2)	1.820	0.832–3.679	0.127
Postoperative chemotherapy	0.260	0.120–0.626	0.004
Multivariate analysis	Hazard ratio	95 % CI	p value
Tubular adenocarcinoma	0.531	0.233–1.130	0.102
Non-curative gastric resection	0.309	0.152–0.615	<0.01
Postoperative chemotherapy	0.136	0.056–0.353	<0.01

PS performance status, ASA-PS ASA physical status