RURUS SURYAWAN Score: A Novel Scoring System to Predict 30-Day Mortality for Acute Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention

Background/Objectives: It is essential to identify acute myocardial infarction patients with greater risk of deterioration following primary percutaneous coronary intervention. Given an inconsistent result about predictors of 30-day outcomes regarding scoring system for first episode of acute myocardial infarction, the objective of this study is to develop novel scoring system to predict 30-day mortality among patients with first episode of acute myocardial infarction underwent primary percutaneous coronary intervention. Methodology. Retrospective study was conducted with total sampling for all patients with first-time acute myocardial infarction underwent primary percutaneous coronary intervention, between 2021 to 2024 at Dr. Soetomo Hospital, Indonesia. We performed a total sampling, collected 1714 patients, in which 1535 patients were included.. Primary outcomes were 30-day mortality. Results. The analysis included 1535 patients: derivation set 926 and validation set 609. In our study, the 30-day mortality was 20.7%. Multivariate logistic regression analysis was used to build prediction models in derivation group, and then validated in validation cohort. Discrimination, calibration and clinical usefulness of the predicting model were assessed using the C-index, calibration plot and decision curve analysis. After pairwise comparison, the best performing model was chosen to build a nomogram according to the regression coefficients. The AUROC was 0.944 (0.906–0.972) in the derivation set and 0.959 (0.921–0.983) in the validation set. Conclusion. After adjusting for potential confounders, we developed RURUS SURYAWAN, a novel scoring system to identify predictor of 30-day mortality among acute myocardial infarction before primary percutaneous coronary intervention.