Table 5.

Univariate and multivariate analysis of prognostic factors of ENR and LNR in the purely regional 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)	0.437		NS	0.997		NS
≤46 years
>46 years		/			/
Gender	0.749		NS	0.885		NS
Male
Female		/			/
Smoking status	0.264		NS	0.705		NS
Non-smoker
Smoker		/			/
Alcohol abuse	0.032		0.001	0.970		NS
Non-drinker		Reference
Drinker		3.070 (1.551–6.076)			/
Tumor family history	0.599		NS	0.796		NS
No
Yes		/			/
Cranial nerve symptom	0.035		NS	0.315		NS
No
Yes		/			/
Baseline value of EBV-DNA	0.090		NS	0.323	/	NS
≤2,000
>2,000		/			/
Histological type	0.979		NS	0.234		NS
WHO I/II
WHO III		/			/
T stage	0.353		NS	0.580		NS
1/2
3/4		/			/
N stage	0.048		NS	0.192		NS
0/1
2/3		/			/
TNM stage	0.037		0.016	0.494		NS
I/II		Reference
III/IV		2.394 (1.178–4.864)			/
RT+/Chemo	0.823		NS	0.740		NS
RT alone
RT+Chemo		/			/