Table 2– Statistically significant correlations between miRNA levels in plasma of nonsmall cell lung cancer patients and clinical characteristics

	Patients n	Mean rank	p-value
Let-7f
Resectable	37	36.38	0.031
Not resectable	41	44.76
miR30e-3p
Resectable	37	31.54	0.007
Not resectable	39	45.10
miR20b
I+II stages	20	26.20	0.008
III+IV stages	33	41.08
Negative LNM	23	20.43	0.01
Positive LNM	29	31.31

LNM: lymph node metastases.