Table 6.

Univariate and multivariate analysis of prognostic factors of ELR and LLR in the locoregional recurrence group.

Characteristic	ETR group			LTR group
	Univariate P-value HR (95% CI)		Multivariate P-value	Univariate P-value HR (95% CI)		Multivariate P-value
Age(years)	0.069		NS	0.063		NS
≤46 years
>46 years		/			/
Gender	0.837		NS	0.101		NS
Male
Female		/			/
Smoking status	0.245		NS	0.483		NS
Non-smoker
Smoker		/			/
Alcohol abuse	0.194		NS	0.817		NS
Non-drinker
Drinker		/			/
Tumor family history	0.106		NS	0.095		NS
No
Yes		/			/
Cranial nerve symptom	0.139		NS	0.771		NS
No
Yes		/			/
Baseline value of EBV-DNA	0.110		NS	0.600		NS
≤2,000
>2,000		/			/
Histological type	0.646		NS	0.392		NS
WHO I/II
WHO III		/			/
T stage	0.557		NS	0.020		0.019
1/2					Reference
3/4		/			3.675 (1.241–10.882)
N stage	0.026		0.004	0.966		NS
0/1		Reference
2/3		2.391 (1.328–4.271)			/
TNM stage	0.363		0.002	0.047		NS
I/II		Reference
III/IV		1.874 (1.248–2.812)			/
RT+/Chemo	0.765		NS	0.403		NS
RT alone
RT+Chemo		/			/