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Table 1 Comparison of clinical and pathologic features by need of resection of IVC

From: Body mass index as an independent risk factor for inferior vena cava resection during thrombectomy for venous tumor thrombus of renal cell carcinoma

Feature In total
N = 86
No. of IVC resection
N = 42
IVC resection N = 44 P value
Median (IQRs)
 Age, years 61.0 (53.8–67.3) 60.5 (53.8–68.0) 61.0 (53.3–67.0) 0.383
 BMI, kg/m2 23.1 (21.1–26.1) 22.0 (19.4–24.3) 23.9 (22.3–27.7) 0.001
 Preoperative SCr, μmol/L 97.5 (83.5–113.0) 92.0 (78.3–113.8) 102.0 (89.0–112.8) 0.074
 Tumor diameter, cm 8.4 (6.9–10.4) 9.3 (7.1–11.3) 8.3 (5.8–10.0) 0.016
 TT width, cm 22.0(12.8–27.3) 21.0 (18.0–25.0) 24.5 (19.3–28.8) 0.032
N (%)
Sex
 Male 61 (70.9) 26 (61.9) 35 (79.5) 0.072
 Female 25 (29.1) 16 (38.1) 9 (20.5)
Side
 Left 21 (24.4) 9 (21.4) 12 (27.3) 0.528
 Right 65 (75.6) 33 (78.6) 32 (72.7)
ASA score
 1 4 (4.7) 3 (7.1) 1 (2.3) 0.113
 2 67 (77.9) 35 (83.3) 32 (72.7)
 3 15 (17.4) 4 (9.5) 11 (25.0)
cN stage
 cN0 41 (47.7) 22 (52.4) 19 (43.2) 0.393
 cN1 45 (52.3) 20 (47.6) 25 (56.8)
cM stage
 cM0 58 (67.4) 25 (59.5) 33 (75.0) 0.126
 cM1 28 (32.6) 17 (40.5) 11 (25.0)
Mayo classification
 1 26 (30.2) 18 (42.9) 8 (18.2) 0.048
 2 26 (30.2) 12 (28.6) 14 (31.8)
 3 21 (24.4) 6 (14.3) 15 (34.1)
 4 13 (15.1) 6 (14.3) 7 (15.9)
Width of thrombus/width of IVC
 ≤ 2/3 33 (38.4) 20 (47.6) 13 (29.5) 0.225
 2/3–1 38 (44.2) 16 (38.1) 22 (50.0)
 >1 15 (17.4) 6 (14.3) 9 (20.5)
IVC occlusion
 Yes 30 (34.9) 10 (23.8) 20 (45.5) 0.035
 No 56 (65.1) 32 (76.2) 24 (54.5)
Pathology type
 Clear cell 68 (79.1) 36 (85.7) 32 (72.7) 0.139*
 Papillary 12 (14.0) 3 (7.1) 9 (20.5)
 Chromophobe 1 (1.2) 0 1 (2.3)
 Ewing’s sarcoma 1 (1.2) 1 (2.4) 0
 Squamous carcinoma 1 (1.2) 0 1 (2.3)
 Unclassified 3 (3.5) 2 (4.8) 1 (2.3)
Furman’s classification
 1–2 29 (33.7) 15 (35.7) 14 (31.8) 0.702
 3–4 57 (66.3) 27 (64.3) 30 (68.2)
  1. IQRs interquartile ranges, IVC inferior vena cava, TT tumor thrombus
  2. *Clear cell type vs. others