Table 3.

Multivariable analysis of risk score for the combined TCGA, ACRG, and Sohn et al. cohorts.

Characteristics	Hazard ratio (95% CI)	P valuea
Age
≤60 years	Reference
>60 years	1.89 (1.53, 2.32)	<0.001
Stage
I	Reference
II	1.33 (0.88, 2.01)	0.18
III	2.65 (1.82, 3.88)	<0.001
IV	5.31 (3.60, 7.83)	<0.001
Risk Score (per unit increase)	1.06 (1.04, 1.09)	<0.001

^aP value for the interaction term is based on the Cox proportional hazards model.