Table 3. Prediction of occurrence of AAD with Cox proportional hazard regression model.

	Univariate			Multivariate
	HR	95% CI	p-value	HR	95% CI	p-value
Gender
Female	1.00			1.00
Male	2.68	1.37 - 5.25	0.0041	2.75	1.34 - 5.64	0.0058
Age
18-39	1.00			1.00
40-65	10.89	1.48 - 80.38	0.0192	8.65	1.13 - 66.01	0.0375
>65	39.67	5.24 - 300.29	0.0004	20.25	2.49 - 164.87	0.0049
Urbanization level
1 (highest)	1.00			1.00
2	0.91	0.43 - 1.94	0.814	0.94	0.44 - 2.02	0.8775
3	2.61	1.21 - 5.63	0.0145	2.33	1.04 - 5.22	0.0403
4 (lowest)	0.55	0.07 - 4.23	0.5687	0.41	0.05 - 3.28	0.4033
Income (NTD per month)
0	1.00			1.00
1-15,840	0.63	0.23 - 1.75	0.3781	0.62	0.22 - 1.73	0.3625
15,841-25,000	0.57	0.26 - 1.25	0.1587	0.49	0.21 - 1.14	0.0959
>25,000	0.48	0.2 - 1.19	0.1127	0.5	0.18 - 1.38	0.1807
ADPKD
No	1.00			1.00
Yes	9.18	4.97 - 16.96	<.0001	3.91	1.53 - 10	0.0043
Medical diseases
Hypertension	15.01	5.35 - 42.11	<.0001	6.42	2.09 - 19.71	0.0012
Diabetes mellitus	0.57	0.2 - 1.6	0.2875	0.29	0.1 - 0.84	0.0219
Dyslipidemia	1.27	0.65 - 2.49	0.4892	0.83	0.41 - 1.67	0.5918
Gout	2.49	1.27 - 4.87	0.008	0.77	0.37 - 1.6	0.4894
Atrial fibrillation	1.46	0.2 - 10.63	0.7082	0.32	0.04 - 2.41	0.2665
Ischemic heart disease	3.25	1.75 - 6.06	0.0002	1.1	0.54 - 2.22	0.7982
Heart failure	6.29	3.09 - 12.84	<.0001	2.1	0.94 - 4.72	0.0711
Cerebrovascular accident	3.48	1.7 - 7.09	0.0006	0.87	0.35 - 2.17	0.7713
Hemorrhagic stroke	6.49	2.31 - 18.2	0.0004	1.98	0.54 - 7.36	0.3057
Peripheral vascular disease	2.02	0.62 - 6.54	0.2417	0.82	0.25 - 2.71	0.7451
Chronic kidney disease	9.63	5.17 - 17.93	<.0001	1.57	0.61 - 4.03	0.3509
Malignancy of kidney or bladder	3.5	0.48 - 25.48	0.2157	0.77	0.1 - 5.78	0.7981

Abbreviations: AAD, aortic aneurysm/dissection; HR, hazard ratio; CI, confidence interval; NTD, New Taiwan dollars; ADPKD, autosomal dominant polycystic kidney disease.