Table 1.

The ORBIT score and its interpretation^a

Risk factor	Points	ORBIT score	Bleeding risk
Age ≥75 years	1	0–2	Low risk
Age ≥75 years			2.4 bleeds per 100 patient-years
			2.4 bleeds per 100 patient-years
eGFR <60 mL/min/1.73 m²	1

Haemoglobin (<13 g/dL for males or <12 g/dL for females)	2	3	Medium risk
Haemoglobin (<13 g/dL for males or <12 g/dL for females)			4.7 bleeds per 100 patient-years
			4.7 bleeds per 100 patient-years
Bleeding history (previous intracranial bleed, haemorrhagic stroke, or gastrointestinal bleed)	2

Treatment with antiplatelet agents	1	≥4	High risk
Treatment with antiplatelet agents	1	≥4	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.