4. TVI of each LNs station in D2-plus lymphadenectomy region.

LN station	Proportion of LN metastasis [% (n/N)]	5-year OS (%)	TVI
TVI, therapeutic value index; LN, lymph node; OS, overall survival. TVI was calculated by multiplication of the frequency of metastasis to the station and the 5-year survival rate of patients with metastasis to that station.
No. 1	10.06 (18/179)	44.4	4.5
No. 3	30.43 (56/184)	23.2	7.1
No. 4sb	15.98 (27/169)	22.2	3.5
No. 4d	2.52 (4/159)	25.0	0.6
No. 5	12.50 (23/184)	26.1	3.3
No. 6	34.30 (59/172)	27.1	9.3
No. 7	17.61 (31/176)	19.4	3.4
No. 8a	18.01 (29/161)	27.5	5.0
No. 8p	28.57 (4/14)	25.0	7.1
No. 9	13.14 (23/175)	26.1	3.4
No. 11p	4.47 (8/179)	0	0
No. 12a	7.09 (10/141)	10.0	0.7
No. 12b	12.96 (7/54)	13.2	1.7
N0. 12p	17.14 (6/35)	33.3	5.7
No. 13	12.82 (5/39)	40.0	5.1
No. 14v	20.00 (5/25)	20.0	4.0
No. 16a2	14.29 (2/14)	50.0	7.1
No. 16b1	14.29 (2/14)	50.0	7.1