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Model calibration performance comparison. A) Calibration performance of the National Cardiovascular Data Registry (NCDR) logistic regression (LR) and machine learning (ML) model with the original Modification of Diet in Renal Disease Study (MDRD) and new Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation in Black patients; B) Calibration performance of the models in non-Black patients. CI: confidence interval.
