O — Older Age (≥ 75 Years)

Age < 75 years+0Age ≥ 75 years+1

R — Reduced Kidney Function (GFR < 60 mL/min/1.73m²)

eGFR ≥ 60 mL/min/1.73m² (normal-to-mildly reduced)+0eGFR < 60 mL/min/1.73m² (CKD stage 3a or worse)+1

B — Bleeding History or Predisposition

No bleeding history or predisposition+0Prior major bleeding episode or known bleeding predisposition+2

I — Iron Deficiency Anemia

No iron deficiency anemia+0Iron deficiency anemia present (low Hgb with iron-deficient indices)+2

T — Treatment with Antiplatelet Agent

Not taking antiplatelet drugs+0Currently taking antiplatelet medication+1

ORBIT Bleeding Risk Score for Atrial Fibrillation