Introduction: Recent advances in machine learning provide new possibilities to process and analyse observational patient data to predict patient outcomes. In this paper, we introduce a data processing pipeline for cardiogenic shock (CS) prediction from the MIMIC III database of intensive cardiac care unit patients with acute coronary syndrome. The ability to identify high-risk patients could possibly allow taking pre-emptive measures and thus prevent the development of CS.
Methods: We mainly focus on techniques for the imputation of missing data by generating a pipeline for imputation and comparing the performance of various multivariate imputation algorithms, including k-nearest neighbours, two singular value decomposition (SVD)-based methods, and Multiple Imputation by Chained Equations. After imputation, we select the final subjects and variables from the imputed dataset and showcase the performance of the gradient-boosted framework that uses a tree-based classifier for cardiogenic shock prediction.
Results: We achieved good classification performance thanks to data cleaning and imputation (cross-validated mean area under the curve 0.805) without hyperparameter optimization.
Conclusion: We believe our pre-processing pipeline would prove helpful also for other classification and regression experiments.
Keywords: cardiogenic shock; classification; machine learning; missing data imputation; prediction model; processing pipeline.
© 2023 Jajcay, Bezak, Segev, Matetzky, Jankova, Spartalis, El Tahlawi, Guerra, Friebel, Thevathasan, Berta, Pölzl, Nägele, Pogran, Cader, Jarakovic, Gollmann-Tepeköylü, Kollarova, Petrikova, Tica, Krychtiuk, Tavazzi, Skurk, Huber and Böhm.