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The effect of demographic factors and lesion severity on iliac stent patency. | LitMetric

AI Article Synopsis

Article Abstract

Objective: The aim of our study was to perform a large multivariate analysis to identify demographic, anatomic, or procedural factors that affect iliac artery stent primary patency (PP).

Methods: Patients receiving iliac stents from 2007 to 2013 were retrospectively reviewed. Univariate analysis assessed cohort characteristics and their effect on PP. Variables considered significant (P < .05) were brought forward in the multivariate analysis.

Results: A total of 213 patients underwent primary iliac artery stenting, and 307 limbs were analyzed. The average age was 66 years (range, 38-93 years), 54% were male, and 55% were Caucasian. Indications for procedure were claudication in 68%, rest pain in 20%, and tissue loss in 12%. All TransAtlantic Inter-Society Consensus for the Management of Peripheral Arterial Disease (TASC) II classifications were included: 51% TASC II A, 25% TASC II B, 13% TASC II C, and 11% TASC II D. The treated anatomic locations were 27% isolated external iliac artery (EIA), 56% isolated common iliac artery, and 17% combined common iliac artery and EIA. Multivariate analysis found three factors were correlated with decreased PP: non-Caucasian race (hazard ratio [HR], 1.84; 95% confidence interval [CI], 1.08-3.13; P = .025), younger age (HR, 1.04; 95% CI, 1.01-1.08; P = .006), and presence of EIA occlusion (HR, 2.02; 95% CI, 1.05-3.89; P = .036). Overall, Kaplan-Meier analysis at 1 and 3 years revealed a PP of 86% and 53%, assisted PP of 98% and 89%, and secondary patency of 99% of 98%. Kaplan-Meier analysis showed PP at 1 year for was 91% Caucasian patients vs 77% for non-Caucasian (P = .001). PP was 75% in patients aged <60 years, 86% in patients aged 60-70 years, and 96% in patients aged >70 years, with a significant difference between all groups (P < .001). PP was significantly different for those with and without EIA occlusion (P = .002), with 1-year PP of 71% and 88%, respectively.

Conclusions: In our experience with a large number of iliac interventions, younger age, non-Caucasian race, and EIA occlusion were strong predictors for loss of PP.

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Source
http://dx.doi.org/10.1016/j.jvs.2015.04.397DOI Listing

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