Table 2. Significant covariates in Cox Proportional Hazards Model for 5-year survival from the day of elective open suprarenal aneurysm repair.

Parameter	Hazard Ratio	95% Confidence Limits		p-value
Age on admission	1.03	1.01	1.05	0.0005
Chronic pulmonary disease	1.42	1.07	1.88	0.0160
Liver disease	2.46	1.09	5.59	0.0310
Renal disease	1.80	1.34	2.41	<0.0001
Metastatic solid tumour	3.06	1.43	6.49	0.0038
Strategic Health Authority
North East vs South East	2.274	1.034	4.999	0.0138
North East vs South Central	2.499	1.239	5.041	0.0138
North East vs South West	1.743	1.037	2.929	0.0138
North West vs South East	2.346	1.073	5.129	0.0138
North West vs South Central	2.579	1.280	5.196	0.0138
North West vs South West	1.798	1.072	3.017	0.0138
Yorkshire and the Humber vs South East	2.266	1.043	4.924	0.0138
Yorkshire and the Humber vs South Central	2.491	1.251	4.959	0.0138
Yorkshire and the Humber vs South West	1.737	1.056	2.857	0.0138
West Midlands vs South East	2.478	1.130	5.435	0.0138
West Midlands vs South Central	2.724	1.353	5.481	0.0138
West Midlands vs South West	1.900	1.132	3.188	0.0138