Table 3.

Kaplan-Meier Analysis and Univariate Analyses of Prognostic Factors for OS and LRFFS of Patients with NPC

	OS				LRFS
	4-year rate (%)	Mean (months)	Univariate analysis (HR; 95% CI)	p value	4-year rate (%)	Mean (months)	Univariate analysis (HR; 95% CI)	p value
Age
≤ 30 years	81.6%	45.8	2.40 (1.01-5.69)	0.03	93.1%	50.2	6.30 (1.49-26.65)	0.04
> 30 years	59.8%	36.1			51.1%	38.3
Gender
Female	70.3%	40.7	1.48 (0.77-2.83)	0.23	66.0%	39.9	0.77 (0.37-1.63)	0.50
Male	62.4%	37.3			60.6%	42.8
Tabaco consumption
No	65.3%	39.1	1.04 (0.48-2.26)	0.90	64.0%	42.2	1.24 (0.50-3.08)	0.63
Yes	68.2%	38.4			57.7%	40.0
Alcohol consumption
No	69.6%	40.7	2.22 (1.09-4.51)	0.02	68.4%	42.9	2.36 (0.95-5.88)	0.06
Yes	39.8%	27.1			44.4%	33.5
Tumor classification
T1-T2	69.9%	39.7	1.21 (0.51-2.58)	0.66	65.8%	42.5	1.21 (0.51-2.87)	0.66
T3-T4	64.2%	38.4			61.1%	41.5
Lymph node status
N0-N1	87.7%	48.8	4.74 (1.86-12.07)	0.001	78.7%	47.3	3.01 (1.20-7.53)	0.01
N2-N3	53.7%	33.4			47.6%	38.1
Metastasis status
M0	82.0%	46.2	5.55 (2.94-10.44)	0.000	64.0%	42.8	1.64 (0.71-3.81)	0.24
M1	29.4%	19.6			73.6%	31.1
Stage of the disease
I-II	91.7%	49.4	6.28 (0.86-45.67)	0.06	87.5%	50.5	6.02 (0.80-44.97)	0.08
III-IV	62.3%	37.5			57.2%	40.2