The CHADS2 score is used to help decide whether or not to prescribe an anticoagulant for atrial fibrillation. 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.
<-- Congestive heart failure
<-- Hypertension: Blood pressure consistently above 140/90 or on blood pressure medication?
<-- Age > 75
<-- Diabetes mellitus
<-- Prior stroke or TIA
Score --> scorescore=(Q1)+(Q2)+(Q3)+(Q4)+(Q5) out of 6 points
Interpretation --> interpretationscore=(Q1)+(Q2)+(Q3)+(Q4)+(Q5);score>2?'5.3% annual stroke risk (high)':score>0?'2.7% annual stroke risk (moderate)':'0.8% annual stroke risk (low)'
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Result - Copy and paste this output: