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Vol. 160. Issue 2.
Pages 71-77 (January 2023)
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Vol. 160. Issue 2.
Pages 71-77 (January 2023)
Original article
Impact of drug interactions with direct oral anticoagulants on mortality in elderly with atrial fibrillation during the COVID-19 pandemic
Impacto de la interacción de fármacos con los anticoagulantes orales directos en la mortalidad de pacientes mayores con fibrilación auricular durante la pandemia por COVID-19
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İbrahim Ersoya,
Corresponding author
iersoytr@hotmail.com

Corresponding author.
, Pınar Ersoyb,c
a Afyonkarahisar Health Sciences University, Department of Cardiology, Afyonkarahisar, Turkey
b Provincial Directorate of Health, Department of Public Health, Afyonkarahisar, Turkey
c Public Health Specialist, Afyonkarahisar, Turkey
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Abstract
Objective

To evaluate the effect of drug interactions with chronic direct oral anticoagulants (DOAC) on mortality in older atrial fibrillation (AF) patients during the Coronavirus disease 2019(COVID-19) pandemic.

Methods

We followed a total of 601 elderly patients (65 years of age) from the NOEL-Drug Registry cohort who were referred to a tertiary outpatient clinic between 9 March 2020 and 1 March 2021. We recorded clinical characteristics and medications for the last 3 months. In addition, all drug interactions were identified using Lexicomp®. Finally, we recorded retrospectively all death events, COVID-19 diagnosis, and relevant deaths from the database at the end of the study. According to logistic regression, we performed propensity score (PS) matching to reduce potential bias. Factors associated with total mortality in the 12 months were analyzed using multivariable Cox proportion hazard analysis.

Results

The mean age [standard deviation (SD)] was 74.5 (±6.9), and the male/female ratio was 337/264. The prevalence of total mortality was 16.9% (n=102). A total of 4472 drugs were analyzed for DOAC interaction. 81.8% of older AF patients were not at risk in terms of potential interaction. In the Cox proportional hazard model after PS-matching, previous DOAC use with class X interaction was associated with significantly higher mortality risk (adjusted hazard ratio: 2.745, 95% confidence interval: 1.465–5.172, p=0.004).

Conclusions

Our study showed that while most co-medications do not have significant interactions with DOACs, few serious drug interactions contribute to mortality in elderly patients with AF during the pandemic.

Keywords:
COVID-19
Elderly
Direct oral anticoagulants
Atrial fibrillation
Mortality
Resumen
Introducción

Evaluar el efecto de las interacciones farmacológicas con anticoagulantes orales directos (ACOD) crónicos sobre la mortalidad en pacientes mayores con fibrilación auricular (FA) durante la pandemia de la enfermedad por coronavirus 2019 (COVID-19).

Métodos

Seguimos a un total de 601 pacientes ancianos (65años) de la cohorte NOEL-Drug Registry que fueron remitidos a una consulta externa de tercer nivel entre el 9 de marzo de 2020 y el 1 de marzo de 2021. Registramos las características clínicas y los medicamentos durante los últimos tres meses. Además, todas las interacciones medicamentosas se identificaron utilizando Lexicomp®. Finalmente, registramos retrospectivamente todos los eventos de muerte, el diagnóstico de COVID-19 y las muertes relevantes de la base de datos al final del estudio. De acuerdo con la regresión logística, realizamos un emparejamiento por puntaje de propensión (PP) para reducir el posible sesgo. Los factores asociados con la mortalidad total en los 12 meses se analizaron mediante análisis de riesgo de proporción de Cox multivariable.

Resultados

La edad media (desviación estándar [DE]) fue de 74,5 (±6,9) y la relación hombre/mujer, de 337/264. La prevalencia de mortalidad total fue del 16,9% (n=102). Se analizaron un total de 4.472 fármacos para determinar la interacción con ACOD. El 81,8% de los pacientes mayores con FA no estaban en riesgo en términos de interacción potencial. En el modelo de riesgos proporcionales de Cox después del emparejamiento por PP, el uso previo de ACOD con interacción X clase se asoció con un riesgo de mortalidad significativamente mayor (índice de riesgo ajustado: 2,745; intervalo de confianza del 95%: 1,465-5,172; p=0,004).

Conclusión

Nuestro estudio mostró que, si bien la mayoría de los medicamentos concomitantes no tienen interacciones significativas con los ACOD, pocas interacciones farmacológicas graves contribuyen a la mortalidad en pacientes de edad avanzada con fibrilación auricular durante la pandemia.

Palabras clave:
COVID-19
Ancianos
Anticoagulantes orales directos
Fibrilación auricular
Mortalidad

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