. Author manuscript; available in PMC: 2017 Nov 1.

Published in final edited form as: J Surg Oncol. 2016 Aug 26;114(6):764–768. doi: 10.1002/jso.24395

Table 1. Characteristics of RCC patients with IVC TT of RCC (at least pT3b stage) and descriptive statistics.

	All patients	Friable IVC TT	Solid IVC TT	p value
no. of patients	413	188	225
pT stage				p = 0.9^a
pT3b	251	112	139
pT3c	130	61	69
pT4	32	15	17
Fuhrmann grade				p=0.2^b
1	9	4	5
2	96	39	57
3	194	83	111
4	114	62	52
VTT level (Mayo classification)				p = 0.03^a
1	113	48	65
2	136	75	61
3	85	37	48
4	79	28	51
Histological subtype				p = 0.4^a
Clear cell RCC	371	169	202
Papillary RCC	29	11	18
Chromophobe RCC	13	8	5
Nodal status				p = 0.8^a
N0 / Nx	297	134	163
N+	116	54	62
Distant metastasis				p = 0.2^a
M0 / Mx	303	145	158
M1	110	43	67
Perinephric fat invasion				p = 0.5^a
Yes	266	124	142
No	147	64	83
IVC wall invasion				P = 0.2 ^a
Yes	119	60	59
No	294	128	166
Sex				p = 0.5^a
Male	278	123	155
Female	135	65	70
Age				p = 0.49^c
Mean	61,5	61,0	61,9
Median	62	61	63
Range	20-84	20-84	23-84

Chi² test,

Fisher's exact test,

T test.