Table 1.

Clinical and pathological data of gastric cancer patients.

Characteristics	Total (n = 488)		Training set (n = 350)		Validation set (n = 138)
	Cases	Ratio (%)	Cases	Ratio (%)	Cases	Ratio (%)
Age (y)
≥50	424	86.9	311	88.9	113	81.9
<50	64	13.1	39	11.1	25	18.1
Sex
Male	369	75.6	264	75.4	105	76.1
Female	119	24.4	86	24.6	33	23.9
Tumor maximum diameter*
≥4 cm	266	54.5	192	54.9	74	53.6
<4 cm	222	45.5	158	45.1	64	46.4
Differentiation degree†
Low	237	48.6	163	46.6	74	53.6
Medium-high	251	51.4	187	53.4	64	46.4
Lauren type
Intestinal	144	29.5	108	30.9	36	26.1
Diffuse	228	46.7	159	45.4	69	50.0
Mixed	116	23.8	83	23.7	33	23.9
T stage‡
T1	99	20.3	75	21.4	24	17.4
T2	68	13.9	47	13.4	21	15.2
T3	12	2.5	9	2.6	3	2.2
T4a	299	61.3	214	61.1	85	61.6
T4b	10	2.0	5	1.4	5	3.6
N stage‡
0	197	40.4	140	40.0	57	41.3
1	78	16.0	51	14.6	27	19.6
2	91	18.6	67	19.1	24	17.4
3a	67	13.7	52	14.9	15	10.9
3b	55	11.3	40	11.4	15	10.9
Vascular tumor thrombus
Yes	161	33.0	119	34.0	42	30.4
No	327	67.0	231	66.0	96	69.6
Nerve invasion
Yes	256	52.5	183	52.3	73	52.9
No	232	47.5	167	47.7	65	47.1
Tumor deposit
Yes	44	9.0	30	8.6	14	10.1
No	444	91.0	320	91.4	124	89.9
Family history of malignant tumor
No	392	80.3	284	81.1	108	78.3
Gastric	42	8.6	28	8.0	14	10.1
Other	54	11.1	38	10.9	16	11.6

^*Median maximum diameter.

^†World Health Organization(WHO) pathological type of gastric cancer: medium-high differentiation includes papillary adenocarcinoma and tubular adenocarcinoma, and low differentiation includes poorly differentiated adenocarcinoma, mucinous adenocarcinoma, and signet-ring cell carcinoma.

^‡American Joint Committee on Cancer(AJCC) 8th edition TNM staging of gastric cancer.