TABLE 2.

Univariate and multivariate survival analysis of TCGA.

	Univariate analysis			Multivariate analysis
Variable	N	P-value	HR (95% CI)	P-value	HR (95% CI)
Gender
Female	11	0.302	0.690 (0.340–1.397)	0.011	0.354 (0.159–0.785)
Male	45
Race
Asian	1	0.518	0.719 (0.264–1.958)	0.924	0.948 (0.317–2.836)
White	55
AJCC stage
I + II	18	0.621	0.850 (0.447–1.617)	0.311	1.942 (0.538–7.017)
III + IV	38
T stage
T1 + T2	28	0.455	0.798 (0.441–1.444)	0.179	0.488 (0.171–1.389)
T3 + T4	28
N stage
N0	33	0.171	0.648 (0.349–1.206)	0.116	0.493 (0.204–1.190)
N +	23
M stage
M0	53	0.387	1.888 (0.447–7.983)	0.179	3.585 (0.556–23.106)
M1	3
Risk score
Low-risk	26	<0.0001	6.412 (2.806–14.625)	<0.0001	9.009 (3.644–22.274)
High-risk	30

N, number; HR, hazard ratio; CI, confidence interval; AJCC, American Joint Commission on Cancer. *Nineteen patients were not enrolled in the univariate and multivariate analysis of TCGA dataset, as some clinical information was not available. All P values in bold were less than 0.05 which were considered statistically significant.