The ATRIA (Anticoagulation and Risk Factors in Atrial Fibrillation) Stroke Risk Score is a clinical calculator used to assess the risk of stroke in patients with atrial fibrillation. This scoring system is particularly useful in guiding clinicians in making decisions about anticoagulation therapy for these patients. 

The ATRIA score includes factors such as age, prior stroke or transient ischemic attack, diabetes, hypertension, heart failure, proteinuria, and renal disease. Each factor is assigned a certain number of points, and the total score is used to categorize patients into low, moderate, or high risk of stroke.

The ATRIA score is not recommended for use in patients without atrial fibrillation, or in those with conditions that may independently increase stroke risk, such as mechanical heart valves or a history of venous thromboembolism.

ATRIA stroke risk score

# Criteria
 ## Age
C. < 65 years (+0)
D. 65-74 years (+3)
E. 75-84 years (+5)
F. >= 85 years (+6)
## Gender
G. Female (+1)
H. Male (+0)
## History of diabetes mellitus
I. Yes (+1)
J. No (+0)
## History of chronic heart failure
K. Yes (+1)
L. No (+0)
## History of hypertension
M. Yes (+1)
N. No (+0)
## Proteinuria
O. Yes (+1)
P. No (+0)
## eGFR < 45 or end-stage renal disease
Q. Yes (+1)
R. No (+0)

# Conditions
- score <= 5
- score == 6
- score >= 7
- score == 0

Comparison of the ATRIA, CHADS2, and CHA2DS2-VASc stroke risk scores in predicting ischaemic stroke in a large Swedish cohort of patients with atrial fibrillation.