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  • Title: Background, incidence, and predictors of antiplatelet therapy discontinuation during the first year after drug-eluting stent implantation.
    Author: Ferreira-González I, Marsal JR, Ribera A, Permanyer-Miralda G, García-Del Blanco B, Martí G, Cascant P, Martín-Yuste V, Brugaletta S, Sabaté M, Alfonso F, Capote ML, De La Torre JM, Ruíz-Lera M, Sanmiguel D, Cárdenas M, Pujol B, Baz JA, Iñiguez A, Trillo R, González-Béjar O, Casanova J, Sánchez-Gila J, García-Dorado D.
    Journal: Circulation; 2010 Sep 07; 122(10):1017-25. PubMed ID: 20733100.
    Abstract:
    BACKGROUND: Predictors of antiplatelet therapy discontinuation (ATD) during the first year after drug-eluting stent implantation are poorly known. METHODS AND RESULTS: This was a prospective study with 3-, 6-, 9-, and 12-month follow-up of patients receiving at least 1 drug-eluting stent between January and April 2008 in 29 hospitals. Individual- and hospital-level predictors of ATD were assessed by hierarchical-multinomial regression analysis. ATD could be assessed in 1622 candidates for follow-up (82.5%). A total of 234 patients (14.4%) interrupted at least 1 antiplatelet therapy drug, predominantly clopidogrel (n=182, 11.8%). Bleeding events or invasive procedures led to ATD in 109 patients. This was predicted by renal impairment (odds ratio [OR] 2.81, 95% confidence interval [CI] 1.48 to 5.34), prior major hemorrhage (OR 3.77, 95% CI 1.41 to 10.03), and peripheral arterial disease (OR 1.78, 95% CI 1.01 to 3.15). Medical decisions led to ATD in 70 patients; this was predicted by long-term use of anticoagulant therapy (OR 3.88, 95% CI 1.26 to 11.98), undergoing the procedure in a private hospital (OR 13.3, 95% CI 1.69 to 105), and not receiving instructions about medication (OR 2.8, 95% CI 1.23 to 6.36). Thirty-nine patients interrupted ATD on their own initiative, mainly immigrants (OR 3.78, 95% CI 1.2 to 11.98) and consumers of psychotropic drugs (OR 2.58, 95% CI 1.3 to 5.12). CONCLUSIONS: ATD during the first year after drug-eluting stent implantation is based mainly on patient decision or a medical decision not associated with major bleeding events or major surgical procedures. Individual- and hospital-level variables are important to predict ATD.
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