cliot (version 1.0.0)

lace_readmission_index: 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)

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.

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.

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)