Table 2 Uni- and multivariate analyses of associations between various factors showing significance in log-rank test and overall survival in patients with metastatic renal cell carcinoma and tumor thrombus who received cytoreductive nephrectomy and thrombectomy

Symptom (systemic symptom vs local symptom and no symptom)

2.52

1.38–4.63

0.00278

2.38

1.26–4.50

0.00753

Nuclear grading (1, 2, 3, vs 4)

1.52

0.668–3.45

0.319

0.989

0.401–2.44

0.980

Pathological type (clear cell carcinoma vs non-clear cell carcinoma)

1.62

1.08–2.43

0.0201

1.68

1.10–2.57

0.0166

Sarcomatous degeneration (yes vs no)

2.22

1.09–4.55

0.0287

2.30

1.07–4.94

0.0334

Renal hilar lymph node (yes vs no)

3.78

1.71–8.37

0.00102

1.55

0.603–3.97

0.364

Perirenal fat infiltration (yes vs no)

2.90

1.56–5.38

<0.001

2.33

1.14–4.74

0.0202