Table 3. Survival analyses stratified by clinicopathologic characteristics and treatment parameters in different countries.

	China (N = 1105)		Korea (N = 4877)		P value†
	N	5-y OSR (%)	N	5-y OSR (%)
Gender
Female	324	56.3	1700	83.3	< 0.001
Male	781	53.4	3177	80.4	< 0.001
Age (yrs)
< 60	618	55.4	2643	84.5	< 0.001
≥ 60	487	52.9	2234	77.6	< 0.001
Longitudinal Tumor location
Upper third	280	43.7	670	76.9	< 0.001
Middle third	140	54.4	1334	82.4	< 0.001
Lower third	661	59.9	2861	82.1	< 0.001
Whole stomach	24	23.4	12	43.7	0.155
Differentiation
G1	11	90.0	645	92.0	0.814
G2	148	62.7	1387	81.0	< 0.001
G3	946	52.6	2845	79.1	< 0.001
Tumor size (cm)
≤ 2	157	83.8	1660	94.7	< 0.001
~ 5.0	523	59.2	2232	83.0	< 0.001
~ 8.0	327	40.0	719	62.6	< 0.001
> 8.0	98	28.1	266	40.3	0.026
Depth of infiltration (pT)
pT1	180	91.4	2710	95.0	0.056
pT2	150	71.4	547	85.0	0.001
pT3	73	54.3	621	75.3	< 0.001
pT4a	573	44.4	970	47.7	0.352
pT4b	129	26.1	29	23.6	0.278
Nodal status (pN)
pN0	320	80.9	3111	92.8	< 0.001
pN1	200	61.8	583	84.1	< 0.001
pN2	184	60.1	493	68.9	0.020
pN3a	245	32.8	432	45.1	0.001
pN3b	156	16.8	258	22.9	0.249
Distal metastasis (M)
M0	981	59.2	4748	83.0	< 0.001
M1	124	15.0	129	21.6	0.404
Stage
I	221	91.6	2928	94.9	0.106
II	216	67.9	772	81.2	0.001
III	544	42.7	1048	51.6	0.001
IV	124	15.0	129	21.6	0.404
Surgical methods
Open surgery	943	52.9	3675	78.1	< 0.001
Minimal invasive surgery	162	62.2	1202	92.0	< 0.001
Resection type
Subtotal gastrectomy	827	59.1	3606	86.1	<0.001
Total gastrectomy	278	40.0	1271	68.0	<0.001
Lymphadenectomy
D1/D1+	578	49.4	2278	91.3	< 0.001
D2/D2+*	527	59.6	2599	72.3	< 0.001
Radicality of surgery
R0	996	58.6	4695	83.6	< 0.001
R1/R2	109	14.4	182	25.7	0.065
Chemotherapy
No	593	50.0	3396	91.5	< 0.001
Yes	512	59.2	1481	57.9	0.347

Abbreviations: OSR, overall survival rate.

^*D2 included No.14v lymph nodes dissection.

^†p-value for log-rank test.