Table 2.

Multivariate analysis adjusted for age, gender, grade, and risk score based on 4 genes signature in the training set

	HR	p
Risk score (low vs. high)	0.34	0.02
Age	1.00	0.88
Gender (male vs. female)	1.52	0.38
Grade (3 and 4 vs. unknown)	0.22	0.10
Grade (1 and 2 vs. unknown)	0.61	0.56