Decreased microRNA-224 and its clinical significance in non-small cell lung cancer patients

Table 2 Univariate and multivariate analysis of overall survival in 115 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	0.62	——	——
Gender
Male vs. Female	0.45	——	——
Smoking status
smoker vs never smoked	0.34	——	——
Histological type
Squamous cell carcinoma vs Others	0.58
Histological grade
(G1 + G2) vs G3	0.19	——	——
T classification
T₁₊₂ vs T₃	0.16	——	——
N classification
Positive vs negative	0.022	0.032	5.156
TNM stage
I-II vs III	< 0.001	0.008	9.328
MiR-224 expression
High vs low	< 0.001	0.015	7.514