Table 3.

Multivariate Cox regression models estimates for progression-free survival and overall survival.

	Progression-free survival		Overall survival
	HR (95%CI)	P	HR (95%CI)	P
Median age, top group	11.1 (2.0–61.2)	0.006	22.7 (2.6–195.2)	0.004
Stage, III-IV	38.6 (6.5–228.0)	< 0.001	5.8 (1.8–18.3)	0.003
Furhman grade, 3–4	12.7 (3.2–50.1)	< 0.001	–	–
Surgical margins, negative	–	–	0.1 (0.02–0.4)	0.001
PRATt, top tertile	–	–	0.3 (0.1–0.7)	0.009
PRATcl, top tertile	0.3 (0.1–0.8)	0.019	–	–

PRATt, perirenal adipose tissue tumor side; PRATcl, perirenal adipose tissue contralateral side.