vaco_index_score: Veterans Health Administration COVID-19 (VACO) Index

In cliot: Clinical Indices and Outcomes Tools

Veterans Health Administration COVID-19 (VACO) Index

Description

Calculates the VACO Index to estimate the 30-day all-cause mortality risk for patients with COVID-19. The index is based on age, sex, and the Charlson Comorbidity Index (CCI) components.

Usage

vaco_index_score(age, sex, myocardial_infarction, congestive_heart_failure,
                 peripheral_vascular_disease, cerebrovascular_disease, dementia,
                 chronic_pulmonary_disease, rheumatologic_disease,
                 peptic_ulcer_disease, liver_disease, diabetes, hemiplegia,
                 renal_disease, cancer, aids)

Arguments

age	Numeric. Patient age in years.
sex	String. "male" or "female".
myocardial_infarction	Numeric (0 or 1). History of myocardial infarction.
congestive_heart_failure	Numeric (0 or 1). History of congestive heart failure.
peripheral_vascular_disease	Numeric (0 or 1). History of peripheral vascular disease.
cerebrovascular_disease	Numeric (0 or 1). History of cerebrovascular disease (e.g., stroke or TIA).
dementia	Numeric (0 or 1). History of dementia.
chronic_pulmonary_disease	Numeric (0 or 1). History of chronic pulmonary disease (e.g., COPD).
rheumatologic_disease	Numeric (0 or 1). History of connective tissue disease.
peptic_ulcer_disease	Numeric (0 or 1). History of peptic ulcer disease.
liver_disease	String. "none", "mild" (chronic hepatitis or cirrhosis without portal hypertension), or "moderate_severe" (cirrhosis with portal hypertension or varices).
diabetes	String. "none", "uncomplicated", or "complicated" (end-organ damage).
hemiplegia	Numeric (0 or 1). History of hemiplegia or paraplegia.
renal_disease	Numeric (0 or 1). Moderate to severe renal disease.
cancer	String. "none", "localized" (any tumor, leukemia, lymphoma), or "metastatic" (metastatic solid tumor).
aids	Numeric (0 or 1). History of AIDS.

Value

A list containing:

VACO_Index_Mortality_30_Day	The estimated 30-day mortality percentage.
Inputs	A summary of the provided inputs and the calculated Charlson Comorbidity Index (CCI) score.

References

King JT Jr, Yoon JS, Rentsch CT, et al. Development and validation of a 30-day mortality index based on pre-existing medical administrative data from 13,323 COVID-19 patients: The Veterans Health Administration COVID-19 (VACO) Index. PLoS One. 2020;15(11):e0241825. doi:10.1371/journal.pone.0241825

Examples

# Example 1: High Risk
# 75yo Male, Complicated Diabetes, CHF
vaco_index_score(75, "male", 0, 1, 0, 0, 0, 0, 0, 0, "none", "complicated", 0, 0, "none", 0)

# Example 2: Low Risk
# 40yo Female, No comorbidities
vaco_index_score(40, "female", 0, 0, 0, 0, 0, 0, 0, 0, "none", "none", 0, 0, "none", 0)

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