Table 3.

Relationship between different subtypes of lung adenocarcinoma and metastatic rate of lymph node (n = 1244)

Subtype	Negative (%)a	Minor component (%)	p value	Predominant (%)	p value
L	11.4	3.1	<0.001	6.3	<0.001
A	10.8	10.1	0.663	9.8	0.176
P	10.5	11.9	0.397	13.5	0.081
M	10.1	17.3	0.004	17.5	0.056
S	9.7	15.5	0.001	18.0	<0.001
IMA	10.6	12.7	0.441	9.7	0.687

Metastatic rate of lymph node = (number of metastatic lymph nodes/number of totally resected lymph nodes) × 100 %

L lepidic, A acinar, P papillary, M micropapillary, S solid, IMA invasive mucinous adenocarcinoma

^aPercentage of patients with subtype of interest not observed or less than 5 %