Table 2.

Univariate analysis of prognostic factors of NPC.

Factors	Hazard ratio	P value
Age (≥55/<55)	1.12	0.867
Gender (male/female)	1.1	0.882
Grade (G3/G1-2)	2.73	0.021
T stage (T3-4/T1-2)	1.63	0.115
Lymph node metastasis (yes/no)	3.45	0.009
Distant metastasis (yes/no)	1.61	0.124
Clinical stage (III-IV/I-II)	5.42	0.001
EBV infection (yes/no)	1.48	0.343
Serum miR-663 levels (high/low)	3.88	0.014