Table 1.

The ORBIT score and its interpretationa

Risk factorPointsORBIT scoreBleeding risk
Age ≥75 years10–2Low risk
2.4 bleeds per 100 patient-years
eGFR <60 mL/min/1.73 m21
Haemoglobin (<13 g/dL for males or <12 g/dL for females)23Medium risk
4.7 bleeds per 100 patient-years
Bleeding history (previous intracranial bleed, haemorrhagic stroke, or gastrointestinal bleed)2
Treatment with antiplatelet agents1≥4High risk
8.1 bleeds per 100 patient-years
  • a Calculate the ORBIT score based on a patient’s risk factors in the left-hand column and the corresponding score. Use this to categorise their bleeding risk as low, medium, or high. eGFR = estimated glomerular filtration rate.