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Fig. 1 | BMC Emergency Medicine

Fig. 1

From: Prospective stratification of patients at risk for emergency department revisit: resource utilization and population management strategy implications

Fig. 1

Study design to develop the ED revisit predictive algorithm. A flow chart of 5 steps from cohort construction to prospective validation is demonstrated. Maine healthcare information was extracted to build a retrospective and prospective cohorts. Samples in the retrospective cohort were randomly split into 3 sub-cohorts (Cohort I, II and III) for training, calibrating and blind testing of a decision_tree_based predictive model. Two thresholds of 0.3 and 0.7 were applied to the ranked outputs of the model to divide the population into low, medium and high risk groups. The model together with the risk stratification was validated on the prospective cohort by PPV, sensitivities and ROC

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