Table 5.

Multivariate analysis of survival prognostic factors

Variables	Hazards ratio	95% Confidence interval	P value
Primary tumour
Breast			0.009
Lung	3.84	1.48–10.00
Renal	3.94	1.39–11.18
Other	1.76	0.70–4.43
Karnofsky performance status (score from 0 to 100)	0.97	0.95–0.99	0.0004
Associated vascular disease
Absent	2.56	1.34–4.89	0.005
Present
Chemotherapy before surgery
Absent	2.39	1.27–4.47	0.007
Present