Predictors of Revascularization in Lower-Extremity Peripheral Artery Disease: Insights From the PORTRAIT Study

Abstract

Background:

Peripheral artery disease (PAD) guidelines recommend revascularization only for patients with lifestyle-limiting claudication that is refractory to goal-directed medical therapy (class IIA, level of evidence A). However, real-world invasive treatment patterns and predictors of revascularization in patients with symptomatic lower-extremity PAD are still largely unknown.

Aim:

We aimed to examine rates, patient-level predictors, and site variability of early revascularization in patients with new or worsening PAD symptoms.

Methods:

Among patients with new-onset or recent exacerbation of PAD in the 10-center Patient-centered Outcomes Related to TReatment practices in peripheral Arterial disease: Investigating Trajectories (PORTRAIT) study enrolled between June 2011 and September 2015, we classified early revascularization (endovascular or surgical) as procedures being performed within 3 months of presentation. Hierarchical logistic regression was used to identify patient characteristics associated with early revascularization. Variability across sites was estimated using the median odds ratio (OR).

Results:

Among 797 participants, early revascularization procedures were performed in 224 (28.1%). Rutherford class 3 (vs Rutherford class 1; OR=1.86, 95% confidence interval [CI] 1.04–3.33) and having lesions in both iliofemoral and below-the-knee arterial segments (vs below the knee only; OR=1.75, 95% CI: 1.15–2.67) were associated with a higher odds of revascularization. Longer PAD duration >12 months (vs 1–6 months; OR=0.50, 95% CI: 0.32–0.77), higher ankle-brachial index scores (per 0.1 unit increase; OR=0.86, 95% CI: 0.78–0.96), and higher Peripheral Artery Questionnaire Summary scores (per 10 unit increase; OR=0.89, 95% CI: 0.80–0.99) were associated with a lower odds of revascularization. The raw rates for revascularization in different sites ranged from 6.25% to 66.28%, and the median OR was 1.88, 95% CI: 1.38–3.57.

Conclusions:

About 1 in 3 patients with symptomatic PAD received early revascularization. A more extensive disease and symptom burden were the main predictors of receiving early revascularization in PAD. There was significant site variability in revascularization patterns, and further studies will better understand the source of this variability and optimal selection criteria for early revascularization.

Clinical Impact

Real world patterns and predictors of early revascularization in peripheral artery disease are not well understood. In this retrospective analysis of the POTRAIT study, about 1 out of 3 patients with PAD symptoms received early revascularization, with significant site variability. A more extensive disease and symptom burden were the main predictors of receiving early revascularization in PAD.