The ATRIA score, or Anticoagulation and Risk Factors in Atrial Fibrillation Bleeding Risk Score, is a clinical calculator used specifically for patients with atrial fibrillation. This scoring system is designed to assess the risk of major bleeding in patients with atrial fibrillation who are on anticoagulation therapy. The ATRIA score takes into account several factors including age, prior bleeding, anemia, severe renal disease, and hypertension. 

The clinical utility of the ATRIA score is to guide clinicians in making informed decisions about anticoagulation therapy in patients with atrial fibrillation, balancing the risk of stroke against the risk of major bleeding. 

There are no specific exclusion criteria for the use of the ATRIA score, but it is most applicable to patients with atrial fibrillation who are on anticoagulation therapy. It may not be as useful or accurate in patients without atrial fibrillation or those not receiving anticoagulation therapy.

Anticoagulation and risk factors in atrial fibrillation bleeding risk score (ATRIA score)

# Criteria
 A. Age >= 75 years (+2)
B. Diagnosed hypertension (+1)
C. History of any hemorrhage (+1)
D. Hemoglobin < 13 g/dL in males or < 12 g/dL in females (+3)
E. Glomerular filtration rate < 30 mL/min or dialysis dependence (+3)

# Conditions
- score <= 3
- score == 4
- score > 4
- score == 0