Table 4.

Improvements of prediction (area under receiver operating characteristic curve) over the baseline LACE (Length of stay, Acuity of the admission, Comorbidity of the patient, and Emergency department use) model for different test cohorts.

Notes	Frequent cohorta	Standard cohortb	Geriatrics cohortc	Combined cohortd
Sociale	2.85%	3.19%	4.32%	3.10%
Social and physicianf	6.64%	6.99%	8.46%	6.72%

^aHold-out sample of patients identified by the hospital as frequent readmission patients.

^bHold-out sample of a typical hospital patient.

^cSubset of patients in the “Standard” sample who are 65 years or older.

^dCombination of “Frequent” and “Standard” hold-out samples.

^eThe readmission model with clinical notes from the medical social worker and case manager.

^fThe readmission model with clinical notes from the medical social workers and case managers.