Predictors of provisional stenting in patients undergoing lower extremity arterial interventions

Predictors of provisional stenting in patients undergoing lower extremity arterial interventions remain unclear. We performed an ad hoc analysis on the predictors of provisional stenting during infrainguinal arterial percutaneous interventions using data from the Percutaneous Lower Extremity Arterial Interventions Using Primary Balloon Angioplasty versus Silverhawk Atherectomy (SA) and Adjunctive Balloon Angioplasty trial. In the above trial, SA of infrainguinal de novo arterial lesions was shown to reduce significantly provisional stenting compared with primary percutaneous transluminal angioplasty (PTA). In this ad hoc analysis, patients were divided into two groups based on whether provisional stenting has occurred. Univariate analysis was conducted between the stent versus the no-stent group. Logistic regression (LR) analysis was performed to model for the predictors of provisional stenting. Variables included were diabetes, presence of moderate calcification (versus none to little), age, gender, hypercholesterolemia, Transatlantic Intersociety Consensus (TASC) D lesion (vs. TASC A to C), and treatment method (primary PTA vs. SA with adjunctive PTA). By LR analysis, predictors of stenting were as follows: moderate calcification (odds ratio [OR] 6.56, 95% confidence interval [CI] 1.21 to 35.56, p = 0.029), primary PTA (vs. SA) (OR 0.19, 95% CI 0.04 to 0.93, p = 0.04), and TASC D lesions (vs. A to C) (OR 0.10, 95% CI 0.01 to 0.87, p = 0.037). Provisional stenting in infrainguinal interventions is predicted by the use of primary PTA, presence of moderate calcification, and TASC D lesions after controlling for gender, age, hypercholesterolemia, and diabetes.