ATRIA Bleeding Risk Score
Estimates bleeding risk in anticoagulated adults with atrial fibrillation.
When to use
Adults with atrial fibrillation on anticoagulation, to stratify bleeding risk.
Pearls and pitfalls
- Anemia and severe renal disease score 3 points each.
- Age 75 or older scores 2 points; 65 to 74 scores 1.
- The score does not contraindicate anticoagulation; it guides monitoring and factor correction.
- Prior bleeding and hypertension add 1 point each.
0/10 points
Low risk
Keep monitoring and reassess risk periodically.
Formula
Add age 75 or older (2), anemia (3), severe renal disease (3), prior bleeding (1) and hypertension (1).
Evidence
Score derived in an anticoagulated cohort to predict major bleeding, with better discrimination than earlier schemes.
References
- Singer DE, Chang Y, Fang MC, et al. A new risk scheme to predict warfarin-associated hemorrhage: the ATRIA (Anticoagulation and Risk Factors in Atrial Fibrillation) study. J Am Coll Cardiol. 2011;58(4):395-401. doi:10.1016/j.jacc.2011.03.031
Frequently asked questions
What is ATRIA Bleeding Risk Score?
Estimates bleeding risk in anticoagulated adults with atrial fibrillation. Adults with atrial fibrillation on anticoagulation, to stratify bleeding risk.
How is the result calculated?
Add age 75 or older (2), anemia (3), severe renal disease (3), prior bleeding (1) and hypertension (1).
How should the result be interpreted?
Score derived in an anticoagulated cohort to predict major bleeding, with better discrimination than earlier schemes.
What are the sources?
Singer DE, Chang Y, Fang MC, et al. A new risk scheme to predict warfarin-associated hemorrhage: the ATRIA (Anticoagulation and Risk Factors in Atrial Fibrillation) study. J Am Coll Cardiol. 2011;58(4):395-401.