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Myocardial injury due to ischaemia within 30 days of non‐cardiac surgery is prognostically relevant. We aimed to determine the discrimination, calibration, accuracy, sensitivity and specificity of single‐layer and multiple‐layer neural networks for myocardial injury and death within 30 postoperative days. We analysed data from 24,589 participants in the Vascular Events in Non‐cardiac Surgery Patients...