Cardiovascular

ORBIT Bleeding Risk Score Calculator

Bleeding risk for AF patients on oral anticoagulation

Calculate ORBIT

Age ≥ 75 (1 pt)Reduced Hemoglobin / Hematocrit / AnemiaBleeding History (GI, ICH, hemorrhagic stroke) (2 pts)Renal Insufficiency (eGFR < 60) (1 pt)Antiplatelet Therapy (1 pt)

Clinical use

Use this calculator for bleeding risk for af patients on oral anticoagulation in thecardiovascular workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.

Interpretation

0-2 = low risk (~2.4%/yr). 3 = medium (~4.7%/yr). 4-7 = high (~8.6%/yr). Better calibrated than HAS-BLED in newer validation studies. Does NOT contraindicate anticoagulation.

Required inputs

Older Age
Reduced Hemoglobin Or Hematocrit
Bleeding History
Renal Insufficiency
Antiplatelet Use

Evidence and limitations

This page cites 1 published reference. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.

References

O'Brien EC et al. Am Heart J 2015;169:747-753

Frequently asked questions

What is the ORBIT Bleeding Risk Score?

ORBIT Bleeding Risk Score is a clinical calculator used for Bleeding risk for AF patients on oral anticoagulation.

How do I interpret the ORBIT Bleeding Risk Score?

0-2 = low risk (~2.4%/yr). 3 = medium (~4.7%/yr). 4-7 = high (~8.6%/yr). Better calibrated than HAS-BLED in newer validation studies. Does NOT contraindicate anticoagulation.