Nutrition status, obesity and outcomes in patients with atrial fibrillation

A paradoxical protective effect of obesity has been previously reported in patients with atrial fibrillation (AF). The aim of this study was to determine the impact of nutritional status and body mass index (BMI) on the prognosis of AF patients. We conducted a retrospective population-based cohort s...

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Published inRevista española de cardiología (English ed.) Vol. 75; no. 10; pp. 825 - 832
Main Authors Raposeiras-Roubín, Sergio, Abu-Assi, Emad, Lizancos Castro, Andrea, Barreiro Pardal, Cristina, Melendo Viu, María, Cespón Fernández, María, Blanco Prieto, Sonia, Rosselló, Xavier, Ibáñez, Borja, Filgueiras-Rama, David, Íñiguez Romo, Andrés
Format Journal Article
LanguageEnglish
Spanish
Published Spain Elsevier España, S.L.U 01.10.2022
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Summary:A paradoxical protective effect of obesity has been previously reported in patients with atrial fibrillation (AF). The aim of this study was to determine the impact of nutritional status and body mass index (BMI) on the prognosis of AF patients. We conducted a retrospective population-based cohort study of patients with AF from 2014 to 2017 from a single health area in Spain. The CONUT score was used to assess nutritional status. Cox regression models were used to estimate the association of BMI and CONUT score with mortality. The association with embolism and bleeding was assessed by a competing risk analysis. Among 14 849 AF patients, overweight and obesity were observed in 42.6% and 46.0%, respectively, while malnutrition was observed in 34.3%. During a mean follow-up of 4.4 years, 3335 patients died, 984 patients had a stroke or systemic embolism, and 1317 had a major bleeding event. On univariate analysis, BMI was inversely associated with mortality, embolism, and bleeding; however, this association was lost after adjustment by age, sex, comorbidities, and CONUT score (HR for composite endpoint, 0.98; 95%CI, 0.95-1.01; P=.719). Neither obesity nor overweight were predictors of mortality, embolism, and bleeding events. In contrast, nutritional status—assessed by the CONUT score—was associated with mortality, embolism and bleeding after multivariate analysis (HR for composite endpoint, 1.15; 95%CI, 1.14-1.17; P<.001). BMI was not an independent predictor of events in patients with AF in contrast to nutritional status, which showed a strong association with mortality, embolism, and bleeding. The study was registered at ClinicalTrials.gov (Identifier: NCT04364516). Se ha descrito un efecto protector paradójico de la obesidad en pacientes con fibrilación auricular (FA) cuya mecanismo no está claro. El objetivo de este estudio fue determinar el impacto del estado nutricional y el índice de masa corporal (IMC) en el pronóstico de los pacientes con FA. Se realizó un estudio de cohortes retrospectivo de pacientes con FA entre 2014 y 2017 de una única área sanitaria en España. La escala CONUT se utilizó para evaluar el estado nutricional. La asociación del IMC y escala CONUT con la mortalidad se analizó por regresión de Cox. La asociación con eventos embólicos y hemorrágicos se evaluó mediante análisis de riesgos competitivos. Entre los 14.849 pacientes, se observó sobrepeso y obesidad en 42,6% y 46,0%, respectivamente, mientras que malnutrición en 34,3%. Durante un seguimiento medio de 4,4 años, 3.335 pacientes murieron, 984 pacientes sufrieron un evento embólico y 1.317 una hemorragia. El IMC se asoció inversamente con la mortalidad, embolias y hemorragias en el análisis univariado; sin embargo, esta asociación se perdió después del ajuste por edad, sexo, comorbilidades y escala CONUT (HR para el combinado de eventos 0,98; IC95%, 0,95-1,01; p=0,719). Por el contrario, la escala CONUT si se asoció con la mortalidad, la embolia y la hemorragia (HR = 1,15; IC95%, 1,14-1,17; p<0,001). El IMC no fue un predictor independiente de eventos en pacientes con FA, a diferencia del estado nutricional, que mostró una fuerte asociación con la mortalidad, la embolia y la hemorragia. El estudio se registró en ClinicalTrials.gov (Identificador: NCT04364516).
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ISSN:1885-5857
1885-5857
DOI:10.1016/j.rec.2022.01.006