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Receiver operator characteristics curves for mortality prediction. (A) The c-statistic for in-hospital mortality using Elastic net LR model had an AUC of 0.72, 95% CI: 0.64 to 0.81 in the internal validation cohort. (B) In the external validation cohort the model had an AUC of 0.85 (95% CI: 0.8 to 0.89) for in-hospital mortality.
