Usefulness of Different Mortality Risk Scores in Patients with Heart Failure. A Retrospective and Observational Study

Abstract

Background: The Cardiac and Comorbid Conditions - Heart Failure (3C-HF) and the Meta-Analysis Global Group in ChronicHeart Failure (MAGGIC) are two score models developed to predict mortality in patients with heart failure (HF). The performanceof these scores has been little studied in our setting.Objective: The aim of this study was to assess the performance of the 3C-HF and the MAGGIC scores to predict one-yearmortality in a population of patients with HF.Methods: Ambulatory HF patients discharged after hospitalization due to acute HF in two centers were included in the study.The 3C-HF and MAGGIC scores were calculated and one-year mortality was the study endpoint. The discrimination abilityof the scores was analyzed from the calculated area under the ROC curve and their calibration quality was assessed applyingthe Hosmer-Lemeshow test. Both areas under the ROC curve were compared using the Hanley-Mc Neil test.Results: A total of 704 patients with mean age of 73±11 years and 39.6% women were included in the study. One-year mortalitywas 12.4% (n=87). Both scores were independent predictors of mortality, with HR of 1.03 (95% CI 1.008-1.06; p=0.02)and 1.08 (95% CI 1.02-1.13; p=0.004) for the 3C-HF and MAGGIC scores, respectively. The area under the ROC curve for the3C-HF score was 0.70 (95% CI 0.64-0.75) and for the MAGGIC score 0.67 (95% CI 0.61-0.73), without significant differencesbetween them (p=0.41). Both scores presented adequate calibration (p=0.06 and p=0.32, respectively).Conclusion: The 3C-HF and MAGGIC scores were predictors of one-year mortality, with a moderate ability to discriminateevents and adequate calibration. The discrimination ability between both scores was not significant.Introducción: El Cardiac and Comorbid Conditions - Heart Failure (3C-HF) y el Meta-Analysis Global Group in Chronic HeartFailure (MAGGIC) son dos sistemas de puntaje desarrollados para predecir la mortalidad en pacientes con insuficiencia cardíaca(IC). El desempeño de estos puntajes ha sido poco estudiado en nuestro medio.Objetivo: Evaluar el desempeño del 3C-HF y del MAGGIC para predecir la mortalidad al año en una población de pacientescon IC.Material y métodos: Se incluyeron pacientes con diagnóstico de IC ambulatorios y dados de alta luego de una internación porIC aguda atendidos en dos centros. Se calcularon los puntajes 3C-HF y MAGGIC. Se evaluó como punto final la mortalidadglobal al año. La capacidad de discriminación de estos puntajes se analizó a partir del cálculo del área bajo la curva (ABC)ROC, y la calidad de su calibración, aplicando el test de Hosmer-Lemeshow. Se compararon ambas ABC mediante el test deHanley-Mc Neil.Resultados: Se incluyeron 704 pacientes con una edad promedio de 73 ± 11 años, el 39,6% eran mujeres. La mortalidad al añofue del 12,4% (n = 87). Ambos puntajes fueron predictores independientes de mortalidad, con HR de 1,03 (IC95% 1,008-1,06;p = 0,02) y 1,08 (IC95% 1,02-1,13; p = 0,004) para el puntaje 3C-HF y el MAGGIC, respectivamente. El 3C-HF presentó unABC de 0,70 (IC95% 0,64-0,75) y el MAGGIC de 0,67 (IC95% 0,61-0,73), sin diferencias entre las ABC (p = 0,41). Ambospresentaron adecuada calibración (p = 0,06 y p = 0,32, respectivamente).Conclusión: Los puntajes 3C-HF y MAGGIC fueron predictores de mortalidad a un año, con una moderada capacidad de discriminareventos y una adecuada calibración. No hubo diferencias en la capacidad de discriminación entre ambos puntajes

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