The Outpatient Bleeding Risk Index is used to help predict the risk of bleeding with anticoagulation. An approach to the decision of warfarin for oral anticoagulation for atrial fibrillation is suggested in (link) Am Fam Physician. 2005 Jun 15;71(12):2348-2350.
1) Use the (link) CHADS2 rule as well as the (link) ACCP rule to determine the risk of stroke.
2) If both these measures predict moderate risk of stroke, proceed to calculate the (link) Outpatient Bleeding Risk Index and weigh the risks versus the benefits.
No (0 points)YES (1 point) <-- Age 65 or older
No (0 points)YES (1 point) <-- History of GI tract bleeding
No (0 points)YES (1 point) <-- History of stroke
No (0 points)YES (1 point) <-- Recent MI, hematocrit lower than 30 percent, creatinine higher than 1.5, or diabetes mellitus.
Score --> scorescore=(Q1)+(Q2)+(Q3)+(Q4) out of 4 points
Interpretation (percent of cases with major bleeding at 1 year) --> interpretationscore=(Q1)+(Q2)+(Q3)+(Q4);score>2?'High risk(10.6-48%)':score>0?'Intermediate risk (2.5-12%)':'Low risk (0-3%)'
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references:
#1 Am Fam Physician. 2005 Jun 15;71(12):2348-2350.
#2 Am Fam Physician. 2010 Mar 15;81(6):780-782.

Result - Copy and paste this output: