Table 2.

Demographic and clinical characteristics of patients with GCLM in CSS group.

Characteristics	All samples N Percentage (%)		Training N Percentage (%)		Validation N Percentage (%)		P
Age(years)
<65	773	44.20%	523	44.06%	250	44.48%	0.8678
>65	976	55.80%	664	55.94%	312	55.52%
Sex
female	476	27.22%	337	28.39%	139	24.73%	0.1085
male	1273	72.78%	850	71.61%	423	75.27%
Race
American Indian/Alaska Native	16	0.91%	10	0.84%	6	1.07%	0.9427
Asian/Pacific Islander	194	11.09%	134	11.29%	60	10.68%
Black	281	16.07%	189	15.92%	92	16.37%
White	1258	71.93%	854	71.95%	404	71.89%
Primary Site
Cardia	741	42.37%	507	42.71%	234	41.64%	0.9731
Pylorus	88	5.03%	58	4.89%	30	5.34%
Body	153	8.75%	107	9.01%	46	8.19%
Antrum	265	15.15%	182	15.33%	83	14.77%
Fundus	26	1.49%	17	1.43%	9	1.60%
Lesser curve	104	5.95%	70	5.90%	34	6.05%
Greater curve	60	3.43%	42	3.54%	18	3.20%
Other	312	17.84%	204	17.19%	108	19.22%
Histologic type
Adenocarcinoma	1452	83.02%	983	82.81%	469	83.45%	0.9448
Signet ring cell	127	7.26%	87	7.33%	40	7.12%
Special type	170	9.72%	117	9.86%	53	9.43%
Grade
I	43	2.46%	31	2.61%	12	2.14%	0.0936
II	553	31.62%	374	31.51%	179	31.85%
III	1113	63.64%	762	64.20%	351	62.46%
IV	40	2.29%	20	1.68%	20	3.56%
T Stage
T0	2	0.11%	1	0.08%	1	0.18%	0.9488
T1	688	39.34%	472	39.76%	216	38.43%
T2	99	5.66%	65	5.48%	34	6.05%
T3	418	23.90%	283	23.84%	135	24.02%
T4	542	30.99%	366	30.83%	176	31.32%
N Stage
N0	674	38.54%	459	38.67%	215	38.26%	0.9483
N1	788	45.05%	537	45.24%	251	44.66%
N2	144	8.23%	97	8.17%	47	8.36%
N3	143	8.18%	94	7.92%	49	8.72%
Radiotherapy
Yes	325	18.58%	215	18.11%	110	19.57%	0.4635
No	1424	81.42%	972	81.89%	452	80.43%
Chemotherapy
Yes	1061	60.66%	727	61.25%	334	59.43%	0.4678
No	688	39.34%	460	38.75%	228	40.57%
Surgery
Yes	240	13.72%	161	13.56%	79	14.06%	0.7795
No	1509	86.28%	1026	86.44%	483	85.94%
Bone Metastasis
Yes	157	8.98%	103	8.68%	54	9.61%	0.5246
No	1592	91.02%	1084	91.32%	508	90.39%
Brain Metastasis
Yes	24	1.37%	13	1.10%	11	1.96%	0.1478
No	1725	98.63%	1174	98.90%	551	98.04%
Lung Metastasis
Yes	297	16.98%	199	16.76%	98	17.44%	0.7264
No	1452	83.02%	988	83.24%	464	82.56%
Marital Status
Yes	1086	62.09%	746	62.85%	340	60.50%	0.3443
No	663	37.91%	441	37.15%	222	39.50%