It uses four parameters:

• “L”: the length of stay of the admission
• “A”: the acuity of the admission (emergency or elective)
• “C”: co-morbidities (the Charlson Co-Morbidity Index)
• “E”: the number of Emergency Department visits within the last 6 months

LACE scores range from 0 to 19:

• 0–4: Low probability of readmission or death within thirty days of discharge
• 5-9: Moderate probability of readmission or death within thirty days of discharge
• ≥10: High probability of readmission or death within thirty days of discharge

Length of Stay	Score
1 day	1
2 days	2
3 days	3
4–6 days	4
7-13 days	5
14+ days	7
Acuity of admission	Score
If patient was admitted via the ED	3
If patient was not admitted via the ED	0
Comorbidities	Score
Previous MI	1
Cerebrovascular disease	1
Peripheral vascular disease	1
Diabetes without complications	1
Congestive heart failure	2
Diabetes with end organ damage	2
Chronic pulmonary disease	2
Mild liver or renal disease	2
Any tumor (including lymphoma or leukemia)	2
Dementia	3
Connective tissue disease	3
AIDS	4
Moderate or severe liver or renal disease	4
Metastatic solid tumor	6
Emergency department visits	Score
How many times the patient has visited an emergency department in the six months prior to admission (not including the emergency department visit immediately preceding the current admission)	Score is this number or 4, whichever is smaller.

Total
0-4	Low probability of readmission or death within thirty days of discharge
5-9	Moderate probability of readmission or death within thirty days of discharge
≥10	High probability of readmission or death within thirty days of discharge

Go to other assessments.