Table 2.

Correlation between the expression (2^−△CT) of plasma miRNA and clinical characteristics of lung cancer patients [median (quartile)] * 10⁻².

Patients	N	miRNA-21	miRNA-31	miRNA-Let7
Age
≥60	28	17.45(5.31,45.29)	0.99(0.03,7.44)	0.15(0.04,19.11)
<60	22	5.89(2.45,15.74)	0.62(0.02,3.85)	0.20(0.02,9.71)
Z-value, P-value		−2.248,0.25	−0.645,0.519	−0.489,0.625
Sex
Male	41	9.48(2.88,24.09)	0.84(0.03,5.69)	0.23(0.04,16.44)
Female	9	20.08(5.10,37.45)	1.85(0.01,17.80)	0.15(0.03,19.51)
Z-value, P-value		−1.557,0.119	−0.048,0.962	−0.564,0.573
Smoking
Ex smokers/smokers	36	10.41(3.66,29.77)	0.59(0.03,6.46)	0.13(0.04,13.90)
Never	14	4.66(1.43,14.75)	0.23(0.02,2.82)	0.15(0.02,10.10)
Z-value, P-value		−0.281,0.779	−0.259,0.795	−0.454,0.650
Lump size
Max. Diameter ≥ 5 mm	33	8.03(1.68,21.86)	0.79(0.04,6.55)	2.21(0.08,17.72)
Max. Diameter < 5 mm	17	5.16(1.10,28.74)	0.22(0.01,2.03)	0.11(0.02,8.32)
Z-value, P-value		−0.891,0.373	−1.116,0.264	−1.014,0.311
Lymph node metastasis
Metastasis	14	13.28(5.89,31.43)	1.31(0.07,8.21)	2.93(0.05,28.70)
Never	36	10.41(3.19,28.57)	0.03(0,1.55)	0.06(0.03,0.16)
Z-value, P-value		−0.821,0.412	−2.269,0.023	−2.182,0.029