Table 2.

Evaluating influencing factors on progression‐free survial (PFS) by stepwise multivariate Cox regression mode

Variable	Regression coefficient	Standard error	P‐value	Hazard ratio	Lower HR	Upper HR
Surgery (yes vs. no)	−1.1228	0.3942	0.0049	0.32	0.15	0.70
Radiotherapy (yes vs. no)	−1.2327	0.3156	0.0001	0.32	0.16	0.54
Metastasis (distant vs. lymphatic only)	0.9684	0.3557	0.0044	2.63	1.31	5.29
Chemotherapy regimen (PTX vs. GEM)	−1.4336	1.1812	0.2249	0.24	0.02	2.41