Table 4. Log-rank pair-wise comparison of new risk groups’ association with prostate-cancer-specific mortality in the testing set (n = 4,113).

New Risk Group	New Risk Group
	1		2		3		4
	X2	p-Value	X 2	p-Value	X 2	p-Value	X 2	p-Value
1	—	—
2	6.30	0.012	—	—
3	33.30	<0.0001	12.64	<0.0001	—	—
4	48.27	<0.0001	28.14	<0.0001	1.53	0.216	—	—
5	157.16	<0.0001	148.86	<0.0001	67.80	<0.0001	79.79	<0.0001