. Author manuscript; available in PMC: 2017 Feb 17.

Published in final edited form as: J Vasc Surg. 2015 Jul 26;62(3):655–64.e8. doi: 10.1016/j.jvs.2015.04.391

Table V.

Multivariable Cox proportional hazards model of factors associated with amputation-free survival (AFS) after peripheral vascular intervention (PVI) for critical limb ischemia (CLI)^a

Variable	HR	95% CI	P value
Dialysis dependence	2.4	1.6–3.5	<.01
Not living at home preoperatively	1.8	1.1–3.0	.03
CHF	1.7	1.2–2.3	<.01
Tissue loss	1.6	1.1–2.5	.02
Male gender	1.5	1.1–2.0	.02
Arterial segment
Multilevel vs CFA-PFA^b	3.4	1.2–9.5	.02
Tibial-peroneal vs aortoiliac	2.1	1.3–3.5	<.01
Multilevel vs aortoiliac^b	1.6	1.0–2.5	.04
Tibial-peroneal vs SFA-popliteal	1.6	1.0–2.5	.03
CFA-PFA vs tibial-peroneal	0.2	0.1–.06	<.01

CFA, Common femoral artery; CHF, congestive heart failure; CI, confidence interval; HR, hazard ratio; PFA, profunda femoris artery; SFA, superficial femoral artery.

C index = 0.70.

Multilevel includes any combination of >1 segment.