Atrial Fibrillation CHADS(2) Score for Stroke Risk

Select Criteria:
Diagnosed heart failure, past or current (1 point)
Hypertension treated or untreated (1 point)
Age >= 75 years (1 point)
Diabetes Mellitus (1 point)
Secondary prevention in patients with prior ischemic stroke, TIA or thromboembolism (2 points)
Results: Total Criteria Point Count:
Stroke Risk per 100 Person Years/Warfarin Rx Interpretation
0 Points:0.25 ON Rx; 0.49 NO Rx
1 Point:0.72 ON Rx; 1.52 NO Rx
2 Points: 1.27 ON Rx; 2.50 No Rx
3 Points:2.20 ON Rx; 5.27 NO Rx
4 Points:2.35 ON Rx; 6.02 NO Rx
5-6 Points:4.60 ON Rx; 6.88 NO Rx
  1. Gage BF, Waterman AD, Shannon W, et. al. Validation of clinical classification schemes for predicting stroke: results from the National Registry of Atrial Fibrillation. JAMA. 2001 Jun 13;285(22):2864-70.
  2. Go AS, Hylek EM, Chang Y, et. al. Anticoagulation therapy for stroke prevention in atrial fibrillation: how well do randomized trials translate into clinical practice?. JAMA. 2003 Nov 26;290(20):2685-92.
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