Table 2. Survival rate(%) and MST(Months) of patients with gastric cancer with distant metastases.

	PMTR			PTR			No Surgery			P
	Survival rate(%)		MST	Survival rate(%)		MST	Survival rate(%)		MST
	1Y	3Y		1Y	3Y		1Y	3Y
Total	49.6	12.5	12.0	49.1	15.1	12.0	30.1	5.8	9.0	<0.001
Age
≤75y	52.9	13.6	14.0	51.3	15.9	13.0	30.9	6.2	8.0	<0.001
>75y	32.9	6.4	9.0	39.4	11.5	8.0	26.5	4.3	7.0	<0.001
Race
white	51.9	11.4	14.0	47.2	15.4	12.0	30.2	5.4	8.0	<0.001
black	38	10.4	11.0	54.1	14.2	13.0	26.1	5.2	7.0	<0.001
other	46.2	16.4	12.0	51.6	14.1	13.0	32.5	8.6	8.0	<0.001
Gender
male	55.9	13.8	15.0	51.1	16.5	13.0	30.7	5.6	8.0	<0.001
female	42.9	11	11.0	45.5	12.5	11.0	28.8	6.3	8.0	<0.001
Site of tumor
body	47.8	13.7	12.0	58.2	15.6	12.0	30.1	6.4	80.0	<0.001
cardia	60.6	13.8	16.0	57.3	23.3	13.0	32.1	6.6	9.0	<0.001
fundus	40	0	11.0	58.6	18.7	14.0	26.2	2.8	7.0	0.007
pylorus	43.6	10.9	12.0	41.7	19.3	8.0	24.6	1.5	6.0	0.004
stomach	36.6	9.8	10.0	44.1	19.3	12.0	26.4	4.2	7.0	<0.001
Grade
well	50	0	10.0	45.5	0	11.0	35.5	3.1	9.0	0.899
moderate	64.2	28.5	17.0	66.8	21.7	17.0	35.1	6.7	9.0	<0.001
poor	47.6	9.7	12.0	45.2	12.9	11.0	28.9	5.3	8.0	<0.001
undifferentiated	25.2	0	11.0	48.6	15.7	12.0	35.4	10.3	9.0	0.145
Histological type
non-signet-ring cell	53.7	15.1	14.0	53	16.7	13.0	30.8	6.2	8.0	<0.001
signet-ring cell	38.8	5.1	11.0	40.3	11.3	10.0	27.4	4.4	7.0	<0.001
T-stage*
T1-2	60	25	14.0	63.3	35.6	24.0	30.7	6.1	8.0	<0.001
T3-4	49.4	11.8	12.0	47.7	12.8	12.0	32	6	8.0	<0.001
N-stage*
N0-1	49.1	14	12.0	55.4	25.1	14.0	31.4	6.2	8.0	<0.001
N2-3	49.6	11.2	12.0	46.2	9.6	11.0	45	11	11.0	0.272
Radiation
done	63.9	24.5	17.0	58.3	20.5	16.0	31.1	5.6	8.0	<0.001
no radiation	46.7	9.5	12.0	46.3	13.4	11.0	29.7	5.8	8.0	<0.001

PMTR: patients who underwent resection of both primary tumor and distant metastatic tumors; PTR: patients received primary tumor resection alone; No surgery: patients did not undergo any surgery.

* T-stage and N-stage according to the 7th edition of AJCC TNM staging.