Table 2.

Summarization of clinical features.

	Subgroup	Low risk	High risk	P
Age (years)		60.59 ± 12.10	60.60 ± 12.29	0.994
Gender (%)	Female	82 (35.3)	75 (33.0)	0.673
	Male	150 (64.7)	152 (67.0)
Grade (%)	G1+G2	128 (55.2)	76 (33.5)	<0.001
	G3+G4	104 (44.8)	151 (66.5)
Stage (%)	Stage I+II	162 (69.8)	102 (44.9)	<0.001
	Stage III+IV	70 (30.2)	125 (55.1)