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Calculator: Clinical characteristics comprising the HAS-BLED bleeding risk score in adults


Calculator: Clinical characteristics comprising the HAS-BLED bleeding risk score in adults

 

Hypertension (1 point)

Abnormal liver function (1 point)

Abnormal renal function (1 point)

Stroke (1 point)

Bleeding tendency or predisposition (1 point)

Labile INRs in patients taking warfarin (1 point)

Elderly: age greater than 65 years (1 point)

Drugs: concomitant antiplatelet agents (eg, aspirin, clopidogrel, ticlopidine, nonsteroidal antiinflammatory agents) (1 point)

Drugs: concomitant excess alcohol use (1 point)

 
Important: Inputs must be complete to perform calculation.

 
Total criteria point count:
 

 

HAS-BLED score interpretation

 
0 points: 1.13 bleeds per 100 patient-years
1 point: 1.02 bleeds per 100 patient-years
2 points: 1.88 bleeds per 100 patient-years
3 points: 3.74 bleeds per 100 patient-years
4 points: 8.70 bleeds per 100 patient-years
5 to 9 points: Insufficient data

 
Notes
  • Abnormal liver function: Chronic liver disease (eg, cirrhosis) or biochemical evidence of significantly impaired liver function (eg, bilirubin >2 times ULN plus one or more liver enzymes >3 times ULN)
  • Abnormal renal function: Chronic dialysis, renal transplantation, or serum creatinine ≥2.26 mg/dL (200 micromol/L)
  • Stroke: Previous history
  • Bleeding: Bleeding disorder or previous bleeding episode requiring hospitalization or transfusion
  • Labile INRs: Unstable/high INRs or <60 percent of INR values in therapeutic range
  • INR: international normalized ratio; ULN: upper limit of normal

 
Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

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