Table 3.

Multivariate analyses of factors based on the Cox regression model.

Outcomes	Variables in the final model	B	SE	HR (95%CI)	P
DMFS
	Tumor stage
	T1
	T2	-0.310	0.387	0.734 (0.343-1.568)	0.424
	T3	-0.695	0.272	0.499 (0.293-0.850)	0.011
	T4	-0.366	0.185	0.694 (0.483-0.997)	0.048
	Node stage
	N0
	N1	-1.502	0.344	0.223 (0.113-0.437)	<0.001
	N2	-1.854	0.248	0.157 (0.096-0.255)	<0.001
	N3	-0.908	0.212	0.403 (0.266-0.612)	<0.001
	Induction chemotherapy
	CCRT
	IC+CCRT	0.405	0.168	1.500 (1.078-2.086)	0.016
	Radiation duration
	≤ 7 weeks
	> 7 weeks	-0.362	0.165	0.696 (0.504-0.962)	0.028
LRRFS
	Node stage
	N0
	N1	-1.346	0.481	0.260 (0.101-0.669)	0.005
	N2	-0.823	0.292	0.439 (0.248-0.779)	0.005
	N3	-0.603	0.284	0.547 (0.314-0.955)	0.034
	Radiation duration
	≤ 7 weeks
	> 7 weeks	-0.637	0.190	0.529 (0.365-0.768)	<0.001
PFS
	Age (continuous)	0.011	0.005	1.011 (1.001-1.022)	0.037
	Tumor stage
	T1
	T2	-0.622	0.297	0.537 (0.300-0.962)	0.036
	T3	-0.463	0.180	0.629 (0.442-0.895)	0.010
	T4	-0.565	0.131	0.568 (0.440-0.734)	<0.001
	Node stage
	N0
	N1	-1.299	0.266	0.273 (0.162-0.459)	<0.001
	N2	-1.127	0.179	0.324 (0.228-0.460)	<0.001
	N3	-0.634	0.169	0.530 (0.381-0.739)	<0.001
	Radiation duration
	≤ 7 weeks
	> 7 weeks	-0.382	0.117	0.682 (0.543-0.857)	<0.001
OS
	Age (continuous)	0.021	0.007	1.021 (1.008-1.035)	0.007
	Tumor stage
	T1
	T2	-0.765	0.355	0.465 (0.232-0.932)	0.031
	T3	-0.942	0.233	0.390 (0.247-0.615)	<0.001
	T4	-0.943	0.159	0.393 (0.288-0.536)	<0.001
	Node stage
	N0
	N1	-1.668	0.336	0.189 (0.098-0.364)	<0.001
	N2	-1.404	0.210	0.246 (0.163-0.371)	<0.001
	N3	-0.863	0.196	0.422 (0.287-0.620)	<0.001
	Radiation duration
	≤ 7 weeks
	> 7 weeks	-0.505	0.143	0.604 (0.456-0.799)	<0.001

OS, Overall survival; DMFS, Distant metastasis–free survival; LRRFS, locoregional relapse–free survival; PFS, progression–free survival.