Table 3.

Results of the univariate and multivariate survival analyses for OS according to the Cox regression model

	RR	95% CI	P-value
Univariate survival analysis
Age (≤60 vs. >60)	1.142	0.812-1.606	0.444
Gender (male vs. female)	1.262	0.858-1.855	0.237
Tumor locationg	0.909	0.649-1.273	0.579
Surgery (left thoracotomy vs. three incision)	0.142	0.812-1.606	0.444
Histologic gradeh	1.297	0.971-1.731	0.078
T categoryi	1.470	1.010-2.140	0.044
N category (0 vs. 1/2/3)	3.465	2.414-4.972	<0.001
LC3 expression (high vs. low)	1.479	1.053-2.077	0.024
Multivariate survival analysis
T category	1.389	0.963-2.005	0.079
N category (1/2/3 vs. 0)	3.388	2.358-4.868	<0.001
LC3 expression (high vs. low)	1.407	1.001-1.977	0.049

^gTumor location: upper vs. middle vs. lower;

^hHistologic grade: G1 vs. G2 vs. G3;

ⁱT category: T1 vs. T2 vs. T3 vs. T4;

RR: relative risk; CI: confidence interval.