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Fig. 2 | BMC Emergency Medicine

Fig. 2

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

Fig. 2

Retrospective cohort construction. The final cohort includes 293,461 ED encounters between Jan 1, 2012 and Dec 31, 2012. 120 encounters associated with patients who have died were excluded from the database. It consisted of 4 subgroups based on the past-year ED visit and chronic disease histories, and was randomly split into 3 parts for training, calibrating and blind testing purposes

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