atria_stroke_risk: ATRIA Stroke Risk Score

In cliot: Clinical Indices and Outcomes Tools

ATRIA Stroke Risk Score

Description

Calculates the ATRIA (Anticoagulation and Risk Factors in Atrial Fibrillation) Stroke Risk Score. This tool estimates the risk of ischemic stroke in patients with atrial fibrillation. It was developed to improve upon the CHADS2 score by incorporating differential weighting for age, prior stroke, and including renal dysfunction variables.

Usage

atria_stroke_risk(age, prior_stroke, female_sex, diabetes, chf,
                  hypertension, proteinuria, egfr_lt_45_or_esrd)

Arguments

age	Numeric. Patient age in years. <65: 0 points. 65-74: 3 points. 75-84: 5 points. >=85: 6 points.
prior_stroke	Numeric (0 or 1). History of prior stroke. (1 = Yes, +4 points).
female_sex	Numeric (0 or 1). Patient is female. (1 = Yes, +1 point).
diabetes	Numeric (0 or 1). History of diabetes mellitus. (1 = Yes, +1 point).
chf	Numeric (0 or 1). History of Congestive Heart Failure. (1 = Yes, +1 point).
hypertension	Numeric (0 or 1). History of hypertension. (1 = Yes, +1 point).
proteinuria	Numeric (0 or 1). Presence of proteinuria. (1 = Yes, +1 point).
egfr_lt_45_or_esrd	Numeric (0 or 1). eGFR < 45 mL/min/1.73m^2 or End-Stage Renal Disease. (1 = Yes, +1 point).

Value

A list containing:

ATRIA_Score	The calculated risk score (Range 0-15).
Risk_Category	Classification (Low 0-5, Moderate 6, High 7-15).
Annual_Stroke_Risk	Estimated annual stroke rate.

References

Singer DE, Chang Y, Borowsky LH, et al. A new risk scheme to predict ischemic stroke and other thromboembolism in atrial fibrillation: the ATRIA (Anticoagulation and Risk Factors in Atrial Fibrillation) Study. J Am Heart Assoc. 2013;2(3):e000250. doi:10.1161/JAHA.113.000250

Examples

# Example 1: High Risk
# 85yo (+6), Female (+1), Prior Stroke (+4)
# Score = 11
atria_stroke_risk(85, 1, 1, 0, 0, 0, 0, 0)

# Example 2: Low Risk
# 70yo (+3), HTN (+1), No other factors
# Score = 4
atria_stroke_risk(70, 0, 0, 0, 0, 1, 0, 0)

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