The MAGGIC risk score predicts mortality in patients undergoing transcatheter aortic valve replacement: sub-analysis of the OCEAN-TAVI registry

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Abstract
This study is aimed to evaluate the performance of MAGGIC risk score for predicting mortality by external validation using multicenter transcatheter aortic valve replacement (TAVR) registry. We assessed 1383 patients who underwent TAVR from October 2013 to April 2016. Patients were divided into 2 groups according to the median of MAGGIC score and we compared the incidence of all-cause death between high and low MAGGIC score. To assess whether the MAGGIC risk score add prognostic value on STS risk score, we also compared the incidence of all-cause death between the 2 groups according to low, intermediate, and high STS score. The median of MAGGIC score was 29 (interquartile range: 13–46). Within 2 years, 147 cases of all-cause death were observed. The high MAGGIC (30–46) risk score was significantly associated with an increased risk of all-cause death as compared to low MAGGIC (11–29) risk score and this relationship was also observed in patients with high STS risk score. However, this relationship was not observed in patients with low and intermediate STS score. Multivariate analysis showed that the MAGGIC risk score was an independent predictor of all-cause death (hazard ratio, 1.07; 95% confidence interval, 1.03–1.11). Our results demonstrated that the MAGGIC score predicts all-cause death in TAVR population and provides better risk stratification, particularly in patients with high STS risk.

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