Polypharmacy is Associated with an Increased Risk of Bleeding in Elderly Patients with Venous Thromboembolism View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2015-01

AUTHORS

Waltraud Leiss, Marie Méan, Andreas Limacher, Marc Righini, Kurt Jaeger, Hans-Jürg Beer, Joseph Osterwalder, Beat Frauchiger, Christian M. Matter, Nils Kucher, Anne Angelillo-Scherrer, Jacques Cornuz, Martin Banyai, Bernhard Lämmle, Marc Husmann, Michael Egloff, Markus Aschwanden, Nicolas Rodondi, Drahomir Aujesky

ABSTRACT

BACKGROUND: Polypharmacy, defined as the concomitant use of multiple medications, is very common in the elderly and may trigger drug-drug interactions and increase the risk of falls in patients receiving vitamin K antagonists. OBJECTIVE: To examine whether polypharmacy increases the risk of bleeding in elderly patients who receive vitamin K antagonists for acute venous thromboembolism (VTE). DESIGN: We used a prospective cohort study. PARTICIPANTS: In a multicenter Swiss cohort, we studied 830 patients aged ≥ 65 years with VTE. MAIN MEASURES: We defined polypharmacy as the prescription of more than four different drugs. We assessed the association between polypharmacy and the time to a first major and clinically relevant non-major bleeding, accounting for the competing risk of death. We adjusted for known bleeding risk factors (age, gender, pulmonary embolism, active cancer, arterial hypertension, cardiac disease, cerebrovascular disease, chronic liver and renal disease, diabetes mellitus, history of major bleeding, recent surgery, anemia, thrombocytopenia) and periods of vitamin K antagonist treatment as a time-varying covariate. KEY RESULTS: Overall, 413 (49.8 %) patients had polypharmacy. The mean follow-up duration was 17.8 months. Patients with polypharmacy had a significantly higher incidence of major (9.0 vs. 4.1 events/100 patient-years; incidence rate ratio [IRR] 2.18, 95 % confidence interval [CI] 1.32-3.68) and clinically relevant non-major bleeding (14.8 vs. 8.0 events/100 patient-years; IRR 1.85, 95 % CI 1.27-2.71) than patients without polypharmacy. After adjustment, polypharmacy was significantly associated with major (sub-hazard ratio [SHR] 1.83, 95 % CI 1.03-3.25) and clinically relevant non-major bleeding (SHR 1.60, 95 % CI 1.06-2.42). CONCLUSIONS: Polypharmacy is associated with an increased risk of both major and clinically relevant non-major bleeding in elderly patients receiving vitamin K antagonists for VTE. More... »

PAGES

17-24

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11606-014-2993-8

DOI

http://dx.doi.org/10.1007/s11606-014-2993-8

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1044001563

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/25143224


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