lace_readmission_index: LACE Index for Readmission

In cliot: Clinical Indices and Outcomes Tools

LACE Index for Readmission

Description

Calculates the LACE Index to predict the risk of unplanned readmission or death within 30 days after hospital discharge. The score is based on Length of stay, Acuity of admission, Comorbidities (Charlson Index), and Emergency department visits in the previous 6 months.

Usage

lace_readmission_index(length_of_stay_days, acute_admission,
                       charlson_comorbidity_index, ed_visits_6months)

Arguments

length_of_stay_days	Numeric. Length of stay in days. <1: 0 pts. 1: 1 pt. 2: 2 pts. 3: 3 pts. 4-6: 4 pts. 7-13: 5 pts. >=14: 7 pts.
acute_admission	Numeric (0 or 1). Was the admission acute/emergent? (1 = Yes, +3 pts).
charlson_comorbidity_index	Numeric. The patient's Charlson Comorbidity Index score. 0: 0 pts. 1: 1 pt. 2: 2 pts. 3: 3 pts. >=4: 5 pts.
ed_visits_6months	Numeric. Number of ED visits in the 6 months prior to admission (excluding the index admission). 0: 0 pts. 1: 1 pt. 2: 2 pts. 3: 3 pts. >=4: 4 pts.

Value

A list containing:

LACE_Score	The calculated total score (Range 0-19).
Risk_Category	Classification (Low 0-4, Moderate 5-9, High >=10).
Est_30_Day_Readmission_Risk	Estimated probability of readmission/death.

References

van Walraven C, Dhalla IA, Bell C, et al. Derivation and validation of an index to predict early death or unplanned readmission after discharge from hospital to the community. CMAJ. 2010;182(6):551-557. doi:10.1503/cmaj.091117

Examples

# Example 1: High Risk
# 5 day stay (+4), Acute (+3), CCI 5 (+5), 2 ED visits (+2)
# Score = 14
lace_readmission_index(5, 1, 5, 2)

# Example 2: Low Risk
# 2 day stay (+2), Elective (0), CCI 0 (0), 0 ED visits (0)
# Score = 2
lace_readmission_index(2, 0, 0, 0)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.