Table 3.

Univariate and multivariate analysis of overall survival in 100 patients with non-small cell lung cancer

Variables	Univariate log-rank test (p)	Cox multivariable analysis (P)	Relative risk (RR)
Age at diagnosis (years)
<60 vs ≥60	0.56	–	–
Gender
Male vs female	0.69	–	–
Histological type
Squamous cell carcinoma vs others	0.32	–	–
Histological grade
(G1 + G2) vs G3	0.038	0.085	1.054
Tumor size
≤3 vs >3 cm	0.13	–	–
N classification
Positive vs negative	0.011	0.035	3.368
TNM stage
I–II vs III	<0.001	0.002	6.587
Plasma miRNA-195
High vs low	<0.001	0.016	4.225