Table 4. Univariable and multivariable cox analysis of relapse-free survival.

Parameters	Univariate analysis			Multivariate analysis
	Hazard ratio	95%CI (lower∼upper)	P-value	Hazard ratio	95%CI (lower-upper)	P-value
Age	0.89	0.63–1.27	0.521
Gender	0.98	0.69–1.4	0.919
Histological type	2.03	0.66–6.29	0.218
Histologic grade	0.98	0.8–1.21	0.873
Stage	1.66	1.38–1.99	0.000	1.11	0.86–1.44	0.416
T classification	1.78	1.49–2.12	0.000	1.65	1.26-2.15	0.000
N classification	0.98	0.68–1.42	0.926
M classification	1.19	0.8–1.78	0.394
Radiation therapy	0.75	0.26–2.17	0.592
Residual tumor	1.27	1.01–1.61	0.042	1.37	1.08–1.74	0.010
SNHG4	2.06	1.37–3.1	0.001	1.95	1.29–2.96	0.002