3.

患者无进展生存期及总生存期的Log-rank检验

Log-rank test to comparing the survival of patients

Variable	PFS			OS
	Log-rank	P		Log-rank	P
PFS: progression-free survival; OS: overall survival.
Gender	3.197	0.074		2.985	0.084
Age	2.149	0.143		4.259	0.039
Histology	19.863	< 0.001		16.573	< 0.001
Stage	2.300	0.129		2.784	0.095
Smoking history	9.438	0.002		8.117	0.004
PS score	9.172	0.003		9.059	0.003
Rash	15.060	0.000		10.365	0.001
Serum CEA	7.596	0.006		3.555	0.059