Table 3:

Cox proportional hazards model to find factors associated with aneurysm reduction

	Single Cox Proportional Hazards Model			Multiple Cox Proportional Hazards Model^{^a}
	Hazard Ratio	95% CI	P Value	Hazard Ratio	95% CI	P Value
Age (yr)	0.93	0.89–0.98	.003	0.99	0.93–1.05	.63
Male sex	0.68	0.25–1.86	.46
Clinical presentation at diagnosis
Asymptomatic	Reference	–	–	Reference	–	–
Pain	14.7	1.94–111	.009	3.63	0.38–34.8	.26
Mass effect	7.94	0.50–127	.14	13.3	0.59–299	.10
Size
Maximum diameter (mm)	0.61	0.46–0.82	.001	0.58	0.41–0.84	.004
≥10 mm	0.29	0.04–2.26	.24
Hypertension	0.08	0.02–0.35	.001	0.12	0.02–0.70	.018
Diabetes^{^b}
Hyperlipidemia	0.47	0.11–2.08	.32
Smoking	0.78	0.29–2.13	.63
Location
Left	1.39	0.16–12.5	.77
Right	2.87	0.37–22.1	.31
Bilateral	Reference

Note:—CI indicates confidence interval.
↵a Variables that were statistically significant in single Cox proportional hazards models were used in the multiple Cox proportional hazards models. The cutoff point of the P value was set at <.05.
↵b All 6 patients with diabetes were excluded from this analysis because their aneurysms were unchanged.