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a Receiver operating characteristic (ROC) analysis of the ROX index in predicting hospitalization (AUC 0.737; 95% CI, 0.696 – 0.779; p < 0.001). b Receiver operating characteristic (ROC) analysis of the ROX index in predicting 30-day mortality (AUC 0.764; 95% CI, 0.708–0.820; p < 0.001)
