Aims Preoperative risk prediction models have important role in heart valve surgery management. Changing in patient characteristics and surgical facilities over time, might affect the predicting value of those scoring system. This study aimed to compare the validation of EuroSCORE II, Ambler score and Harapan Kita score in predicting in hospital mortality at patients underwent heart valve surgery Methods Cohort restrospective study was performed at 416 patients who underwent heart valve surgery from November 2018 to December 2019. Data was taken from the medical records by consecutive sampling method. The calibration and discrimination value of EuroSCORE II, Ambler score and Harapan Kita score were obtained. Results Observed in hospital mortality was 6.7%. EuroSCORE II, Ambler score and Harapan Kita score have good calibration (Hosmer-Lemeshow test p = 0.065, p = 0.233 and p = 0.314). The discriminative value of these three scores predicting in hospital mortality for EuroScore II AUC 0.763 (95% CI; 0.660-0.867), Ambler score AUC 0.748 (95% CI; 0.655-0.841) and Harapan Kita score AUC 0.694 (95% CI; 0.584-0.804) Conclusion EuroSCORE II, Ambler score and Harapan Kita score have fairly good validation. Those scoring system have good calibration with Harapan Kita score calibration relatively better than EuroSCORE and Ambler score, meanwhile Harapan Kita score has less discrimination value than EuroScore II and Ambler score.
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