Table 2.

Metastatic status of D2 tier lymph nodes of included patients

Lymph node station	Positive cases, n (%)	Numbers of metastatic LNs Mean ± SD	Numbers of harvested LNs Mean ± SD
No. 1	74 (61.2)	0.3 ± 0.9	1.4 ± 1.7
No. 3	58 (47.9)	1.8 ± 2.5	5.4 ± 4.6
No. 4d	32 (26.4)	0.7 ± 1.5	4.4 ± 3.7
No. 4sb	3 (2.5)	0.0 ± 0.2	0.7 ± 1.4
No. 5	15 (12.4)	0.2 ± 0.5	0.7 ± 0.9
No. 6*	34 (28.1)	0.8 ± 1.6	5.0 ± 3.4
No. 6a	8 (6.6)	0.1 ± 0.7	0.9 ± 1.7
No. 6b	8 (6.6)	0.1 ± 0.4	0.9 ± 1.4
No. 6c	26 (21.5)	0.6 ± 1.4	3.2 ± 3.3
No. 7	40 (33.1)	0.7 ± 1.1	4.4 ± 3.2
No. 8a	21 (17.4)	0.2 ± 0.5	1.6 ± 1.2
No. 9	35 (28.9)	0.4 ± 0.9	2.9 ± 2.4
No. 11p	24 (19.8)	0.3 ± 0.8	2.2 ± 1.6
No. 12a	2 (1.7)	0.0 ± 0.1	0.4 ± 0.6

*There were 4 patients and 2 patients with two and four subgroup lymph node metastasis of no. 6 group