LACE Index for Hospital Readmission

Length of Stay (L)
Hospital length of stay is defined as the number of days spent in hospital, including the day of admission and discharge.

Acuity of Admission (A)
Acuity of admission is a categorical score (coded either as “0” or “3”) based on whether the patient was admitted via the emergency department.

Comorbidities (C)
Comorbidities are coded based on the disease definitions of the tool.

Emergency Department Use (E)
Emergency department visits can provide up to 4 additional points on the score. One point would be accumulated for every emergency department admission in the 6 months prior to admission, not including the emergency department visit immediately preceding the current admission.

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