Table 4.

Poor prognostic factors of the included studies.

Authors	Univariate Analysis	Multivariate Analysis
Cheng et al. [15]	N3 status N ratio > 0.3 Bormann type IV R1 resection Lymphatic invasion Perineural invasion Pancreas invasion No liver invasion	Bormann type Curative resection Perineural invasion Nodal status No liver invasion
Isozaki et al. [16]	Bormann type 4 Whole stomach Upper-third stomach Dimension of tumor > 90 mm >2 invaded organs N3 status	Location of tumor Histological depth of invasion
Jeong et al. [17]	N3 status Lympho-vascular invasion	Lymphatic invasion
Kobayasbi et al. [27]	Poor differentiation Extensive vascular invasion Lymph vessel invasion Peritoneal dissemination	Peritoneal dissemination Lymph node ratio > 0.2 Poor differentiation
Min et al. [19]	Bormann IV Undifferentiated N3 status Pancreatic invasion	Pancreatic invasion
Mita et al. [22]	N3 status R1 resection Organs resected >= 2 Pancreatic resection Spleen resection	R1 resection
Pacelli et al. [8]	Peritoneal resection N + status R + resection	N + status Peritoneal resection R + resection
Molina et al. [9]	Lymph nodes involvement	Lymphatic invasion R1 resection
Wang et al. [20]	Tumor size (>9 cm) Advanced T stage (pT4b) Lymph node metastasis	Advanced T stage (pT4b) Lymph node metastasis
Yang et al. [21]	Pancreas resection Spleen resection Resection of >15 lymph nodes Vascular tumor emboli R+ resection	R+ resection Vascular tumor emboli Lymph nodes > 15
Xiao et al. [10]	Total gastrectomy Whole gastric location R1 resection	R1 resection Linitis plastica
Xiao et al. [23]	Tumor > 7 cm R+ resection	Tumor > 7 cm Non-curative resection
Ozer et al. [12]	Age > 70 y >2 organs resected Positive lymph node metastasis Presence of comorbidities	Age older > 70 y Lymphatic invasion Number of organs resected >2
Sahakyan et al. [11]	Total gastrectomy Obesity (BMI < 30) N3 status	Obesity (BMI < 30) Nodal stage (N3)