. 2014 May 20;17(5):391–400. [Article in Chinese] doi: 10.3779/j.issn.1009-3419.2014.05.05

6.

Cox多因素分析结果（逐步回归模型，Enter P≤0.05，Removal P > 0.10）

Multivariate analysis of PFS (step by step regression model, Enter P≤0.05, Removal P > 0.10)

Enter variable	Regression coefficient	Standard error of regression coefficient	Wald test	P	Relative risk（RR）	RR (95%CI)
Enter variable	Regression coefficient	Standard error of regression coefficient	Wald test	P	Relative risk（RR）	Minimum	Maximum
RR: response rate.
Smoking characteristics (X1)	0.622	0.239	6.780	0.009	1.863	1.166	2.975
EGFR status (X4)	0.561	0.161	12.087	0.001	1.753	1.277	2.404
Prior chemotherapy effect (X5)	1.441	0.344	18.571	< 0.001	4.226	2.194	8.140
Rash (X6)	0.793	0.238	11.072	0.001	2.209	1.385	3.523
LDH (X8)	0.933	0.258	13.104	< 0.001	2.543	1.543	4.215
TPS (X12)	0.778	0.245	10.080	0.001	2.176	1.347	3.517